Electron density analysis on the alpha acidity of nitriles
Abstract 24 substituted cyanocompounds and the corresponding anions obtained upon $ H^{+} $-abstraction from diverse positions were subjected to an electron density analysis with the quantum theory of atoms in molecules (QTAIM). All the electron densities were obtained at the B3LYP/6–31 + + G(2d,2p)...
Ausführliche Beschreibung
Autor*in: |
López, José Luis [verfasserIn] |
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Format: |
E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2023 |
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Schlagwörter: |
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Anmerkung: |
© The Author(s) 2023 |
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Übergeordnetes Werk: |
Enthalten in: Theoretical chemistry accounts - Berlin : Springer, 1962, 142(2023), 9 vom: 18. Aug. |
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Übergeordnetes Werk: |
volume:142 ; year:2023 ; number:9 ; day:18 ; month:08 |
Links: |
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DOI / URN: |
10.1007/s00214-023-03022-8 |
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Katalog-ID: |
SPR052782697 |
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100 | 1 | |a López, José Luis |e verfasserin |4 aut | |
245 | 1 | 0 | |a Electron density analysis on the alpha acidity of nitriles |
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520 | |a Abstract 24 substituted cyanocompounds and the corresponding anions obtained upon $ H^{+} $-abstraction from diverse positions were subjected to an electron density analysis with the quantum theory of atoms in molecules (QTAIM). All the electron densities were obtained at the B3LYP/6–31 + + G(2d,2p) level on completely optimized geometries. In accordance to experimental evidence, α-$ H^{+} $ abstraction is found as the most favored one (by at least 100 kJ $ mol^{−1} $ in all the tested compounds). The presence of additional resonance electron attractors reduces significantly the α-deprotonation energy, whereas this magnitude is quite insensitive to the inclusion of resonance electron donors. The electron density rearrangement accompanying the deprotonation is apparently in line with the predictions of the resonance model (RM). In fact, a significant part of the electron density gained by expelling the proton is transferred to cyano N and to other groups where significant resonance structures delocalize the negative charge. Nevertheless, some significant modifications have to be introduced on the RM picture when the QTAIM results are studied in detail. | ||
650 | 4 | |a Nitriles |7 (dpeaa)DE-He213 | |
650 | 4 | |a Deprotonation |7 (dpeaa)DE-He213 | |
650 | 4 | |a Acidity |7 (dpeaa)DE-He213 | |
650 | 4 | |a QTAIM |7 (dpeaa)DE-He213 | |
700 | 1 | |a Teixeira, Filipe |0 (orcid)0000-0001-8786-0086 |4 aut | |
700 | 1 | |a Graña, Ana M. |0 (orcid)0000-0002-0794-2215 |4 aut | |
700 | 1 | |a Mosquera, Ricardo A. |0 (orcid)0000-0001-8252-9212 |4 aut | |
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10.1007/s00214-023-03022-8 doi (DE-627)SPR052782697 (SPR)s00214-023-03022-8-e DE-627 ger DE-627 rakwb eng López, José Luis verfasserin aut Electron density analysis on the alpha acidity of nitriles 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2023 Abstract 24 substituted cyanocompounds and the corresponding anions obtained upon $ H^{+} $-abstraction from diverse positions were subjected to an electron density analysis with the quantum theory of atoms in molecules (QTAIM). All the electron densities were obtained at the B3LYP/6–31 + + G(2d,2p) level on completely optimized geometries. In accordance to experimental evidence, α-$ H^{+} $ abstraction is found as the most favored one (by at least 100 kJ $ mol^{−1} $ in all the tested compounds). The presence of additional resonance electron attractors reduces significantly the α-deprotonation energy, whereas this magnitude is quite insensitive to the inclusion of resonance electron donors. The electron density rearrangement accompanying the deprotonation is apparently in line with the predictions of the resonance model (RM). In fact, a significant part of the electron density gained by expelling the proton is transferred to cyano N and to other groups where significant resonance structures delocalize the negative charge. Nevertheless, some significant modifications have to be introduced on the RM picture when the QTAIM results are studied in detail. Nitriles (dpeaa)DE-He213 Deprotonation (dpeaa)DE-He213 Acidity (dpeaa)DE-He213 QTAIM (dpeaa)DE-He213 Teixeira, Filipe (orcid)0000-0001-8786-0086 aut Graña, Ana M. (orcid)0000-0002-0794-2215 aut Mosquera, Ricardo A. (orcid)0000-0001-8252-9212 aut Enthalten in Theoretical chemistry accounts Berlin : Springer, 1962 142(2023), 9 vom: 18. Aug. (DE-627)25490971X (DE-600)1463180-5 1432-2234 nnns volume:142 year:2023 number:9 day:18 month:08 https://dx.doi.org/10.1007/s00214-023-03022-8 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 142 2023 9 18 08 |
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10.1007/s00214-023-03022-8 doi (DE-627)SPR052782697 (SPR)s00214-023-03022-8-e DE-627 ger DE-627 rakwb eng López, José Luis verfasserin aut Electron density analysis on the alpha acidity of nitriles 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2023 Abstract 24 substituted cyanocompounds and the corresponding anions obtained upon $ H^{+} $-abstraction from diverse positions were subjected to an electron density analysis with the quantum theory of atoms in molecules (QTAIM). All the electron densities were obtained at the B3LYP/6–31 + + G(2d,2p) level on completely optimized geometries. In accordance to experimental evidence, α-$ H^{+} $ abstraction is found as the most favored one (by at least 100 kJ $ mol^{−1} $ in all the tested compounds). The presence of additional resonance electron attractors reduces significantly the α-deprotonation energy, whereas this magnitude is quite insensitive to the inclusion of resonance electron donors. The electron density rearrangement accompanying the deprotonation is apparently in line with the predictions of the resonance model (RM). In fact, a significant part of the electron density gained by expelling the proton is transferred to cyano N and to other groups where significant resonance structures delocalize the negative charge. Nevertheless, some significant modifications have to be introduced on the RM picture when the QTAIM results are studied in detail. Nitriles (dpeaa)DE-He213 Deprotonation (dpeaa)DE-He213 Acidity (dpeaa)DE-He213 QTAIM (dpeaa)DE-He213 Teixeira, Filipe (orcid)0000-0001-8786-0086 aut Graña, Ana M. (orcid)0000-0002-0794-2215 aut Mosquera, Ricardo A. (orcid)0000-0001-8252-9212 aut Enthalten in Theoretical chemistry accounts Berlin : Springer, 1962 142(2023), 9 vom: 18. Aug. (DE-627)25490971X (DE-600)1463180-5 1432-2234 nnns volume:142 year:2023 number:9 day:18 month:08 https://dx.doi.org/10.1007/s00214-023-03022-8 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 142 2023 9 18 08 |
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10.1007/s00214-023-03022-8 doi (DE-627)SPR052782697 (SPR)s00214-023-03022-8-e DE-627 ger DE-627 rakwb eng López, José Luis verfasserin aut Electron density analysis on the alpha acidity of nitriles 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2023 Abstract 24 substituted cyanocompounds and the corresponding anions obtained upon $ H^{+} $-abstraction from diverse positions were subjected to an electron density analysis with the quantum theory of atoms in molecules (QTAIM). All the electron densities were obtained at the B3LYP/6–31 + + G(2d,2p) level on completely optimized geometries. In accordance to experimental evidence, α-$ H^{+} $ abstraction is found as the most favored one (by at least 100 kJ $ mol^{−1} $ in all the tested compounds). The presence of additional resonance electron attractors reduces significantly the α-deprotonation energy, whereas this magnitude is quite insensitive to the inclusion of resonance electron donors. The electron density rearrangement accompanying the deprotonation is apparently in line with the predictions of the resonance model (RM). In fact, a significant part of the electron density gained by expelling the proton is transferred to cyano N and to other groups where significant resonance structures delocalize the negative charge. Nevertheless, some significant modifications have to be introduced on the RM picture when the QTAIM results are studied in detail. Nitriles (dpeaa)DE-He213 Deprotonation (dpeaa)DE-He213 Acidity (dpeaa)DE-He213 QTAIM (dpeaa)DE-He213 Teixeira, Filipe (orcid)0000-0001-8786-0086 aut Graña, Ana M. (orcid)0000-0002-0794-2215 aut Mosquera, Ricardo A. (orcid)0000-0001-8252-9212 aut Enthalten in Theoretical chemistry accounts Berlin : Springer, 1962 142(2023), 9 vom: 18. Aug. (DE-627)25490971X (DE-600)1463180-5 1432-2234 nnns volume:142 year:2023 number:9 day:18 month:08 https://dx.doi.org/10.1007/s00214-023-03022-8 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 142 2023 9 18 08 |
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10.1007/s00214-023-03022-8 doi (DE-627)SPR052782697 (SPR)s00214-023-03022-8-e DE-627 ger DE-627 rakwb eng López, José Luis verfasserin aut Electron density analysis on the alpha acidity of nitriles 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2023 Abstract 24 substituted cyanocompounds and the corresponding anions obtained upon $ H^{+} $-abstraction from diverse positions were subjected to an electron density analysis with the quantum theory of atoms in molecules (QTAIM). All the electron densities were obtained at the B3LYP/6–31 + + G(2d,2p) level on completely optimized geometries. In accordance to experimental evidence, α-$ H^{+} $ abstraction is found as the most favored one (by at least 100 kJ $ mol^{−1} $ in all the tested compounds). The presence of additional resonance electron attractors reduces significantly the α-deprotonation energy, whereas this magnitude is quite insensitive to the inclusion of resonance electron donors. The electron density rearrangement accompanying the deprotonation is apparently in line with the predictions of the resonance model (RM). In fact, a significant part of the electron density gained by expelling the proton is transferred to cyano N and to other groups where significant resonance structures delocalize the negative charge. Nevertheless, some significant modifications have to be introduced on the RM picture when the QTAIM results are studied in detail. Nitriles (dpeaa)DE-He213 Deprotonation (dpeaa)DE-He213 Acidity (dpeaa)DE-He213 QTAIM (dpeaa)DE-He213 Teixeira, Filipe (orcid)0000-0001-8786-0086 aut Graña, Ana M. (orcid)0000-0002-0794-2215 aut Mosquera, Ricardo A. (orcid)0000-0001-8252-9212 aut Enthalten in Theoretical chemistry accounts Berlin : Springer, 1962 142(2023), 9 vom: 18. Aug. (DE-627)25490971X (DE-600)1463180-5 1432-2234 nnns volume:142 year:2023 number:9 day:18 month:08 https://dx.doi.org/10.1007/s00214-023-03022-8 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 142 2023 9 18 08 |
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10.1007/s00214-023-03022-8 doi (DE-627)SPR052782697 (SPR)s00214-023-03022-8-e DE-627 ger DE-627 rakwb eng López, José Luis verfasserin aut Electron density analysis on the alpha acidity of nitriles 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2023 Abstract 24 substituted cyanocompounds and the corresponding anions obtained upon $ H^{+} $-abstraction from diverse positions were subjected to an electron density analysis with the quantum theory of atoms in molecules (QTAIM). All the electron densities were obtained at the B3LYP/6–31 + + G(2d,2p) level on completely optimized geometries. In accordance to experimental evidence, α-$ H^{+} $ abstraction is found as the most favored one (by at least 100 kJ $ mol^{−1} $ in all the tested compounds). The presence of additional resonance electron attractors reduces significantly the α-deprotonation energy, whereas this magnitude is quite insensitive to the inclusion of resonance electron donors. The electron density rearrangement accompanying the deprotonation is apparently in line with the predictions of the resonance model (RM). In fact, a significant part of the electron density gained by expelling the proton is transferred to cyano N and to other groups where significant resonance structures delocalize the negative charge. Nevertheless, some significant modifications have to be introduced on the RM picture when the QTAIM results are studied in detail. Nitriles (dpeaa)DE-He213 Deprotonation (dpeaa)DE-He213 Acidity (dpeaa)DE-He213 QTAIM (dpeaa)DE-He213 Teixeira, Filipe (orcid)0000-0001-8786-0086 aut Graña, Ana M. (orcid)0000-0002-0794-2215 aut Mosquera, Ricardo A. (orcid)0000-0001-8252-9212 aut Enthalten in Theoretical chemistry accounts Berlin : Springer, 1962 142(2023), 9 vom: 18. Aug. (DE-627)25490971X (DE-600)1463180-5 1432-2234 nnns volume:142 year:2023 number:9 day:18 month:08 https://dx.doi.org/10.1007/s00214-023-03022-8 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 142 2023 9 18 08 |
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López, José Luis @@aut@@ Teixeira, Filipe @@aut@@ Graña, Ana M. @@aut@@ Mosquera, Ricardo A. @@aut@@ |
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author |
López, José Luis |
spellingShingle |
López, José Luis misc Nitriles misc Deprotonation misc Acidity misc QTAIM Electron density analysis on the alpha acidity of nitriles |
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López, José Luis |
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Electron density analysis on the alpha acidity of nitriles Nitriles (dpeaa)DE-He213 Deprotonation (dpeaa)DE-He213 Acidity (dpeaa)DE-He213 QTAIM (dpeaa)DE-He213 |
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misc Nitriles misc Deprotonation misc Acidity misc QTAIM |
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misc Nitriles misc Deprotonation misc Acidity misc QTAIM |
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misc Nitriles misc Deprotonation misc Acidity misc QTAIM |
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Elektronische Aufsätze Aufsätze Elektronische Ressource |
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Electron density analysis on the alpha acidity of nitriles |
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Electron density analysis on the alpha acidity of nitriles |
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López, José Luis |
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Theoretical chemistry accounts |
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López, José Luis Teixeira, Filipe Graña, Ana M. Mosquera, Ricardo A. |
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Elektronische Aufsätze |
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López, José Luis |
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10.1007/s00214-023-03022-8 |
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title_sort |
electron density analysis on the alpha acidity of nitriles |
title_auth |
Electron density analysis on the alpha acidity of nitriles |
abstract |
Abstract 24 substituted cyanocompounds and the corresponding anions obtained upon $ H^{+} $-abstraction from diverse positions were subjected to an electron density analysis with the quantum theory of atoms in molecules (QTAIM). All the electron densities were obtained at the B3LYP/6–31 + + G(2d,2p) level on completely optimized geometries. In accordance to experimental evidence, α-$ H^{+} $ abstraction is found as the most favored one (by at least 100 kJ $ mol^{−1} $ in all the tested compounds). The presence of additional resonance electron attractors reduces significantly the α-deprotonation energy, whereas this magnitude is quite insensitive to the inclusion of resonance electron donors. The electron density rearrangement accompanying the deprotonation is apparently in line with the predictions of the resonance model (RM). In fact, a significant part of the electron density gained by expelling the proton is transferred to cyano N and to other groups where significant resonance structures delocalize the negative charge. Nevertheless, some significant modifications have to be introduced on the RM picture when the QTAIM results are studied in detail. © The Author(s) 2023 |
abstractGer |
Abstract 24 substituted cyanocompounds and the corresponding anions obtained upon $ H^{+} $-abstraction from diverse positions were subjected to an electron density analysis with the quantum theory of atoms in molecules (QTAIM). All the electron densities were obtained at the B3LYP/6–31 + + G(2d,2p) level on completely optimized geometries. In accordance to experimental evidence, α-$ H^{+} $ abstraction is found as the most favored one (by at least 100 kJ $ mol^{−1} $ in all the tested compounds). The presence of additional resonance electron attractors reduces significantly the α-deprotonation energy, whereas this magnitude is quite insensitive to the inclusion of resonance electron donors. The electron density rearrangement accompanying the deprotonation is apparently in line with the predictions of the resonance model (RM). In fact, a significant part of the electron density gained by expelling the proton is transferred to cyano N and to other groups where significant resonance structures delocalize the negative charge. Nevertheless, some significant modifications have to be introduced on the RM picture when the QTAIM results are studied in detail. © The Author(s) 2023 |
abstract_unstemmed |
Abstract 24 substituted cyanocompounds and the corresponding anions obtained upon $ H^{+} $-abstraction from diverse positions were subjected to an electron density analysis with the quantum theory of atoms in molecules (QTAIM). All the electron densities were obtained at the B3LYP/6–31 + + G(2d,2p) level on completely optimized geometries. In accordance to experimental evidence, α-$ H^{+} $ abstraction is found as the most favored one (by at least 100 kJ $ mol^{−1} $ in all the tested compounds). The presence of additional resonance electron attractors reduces significantly the α-deprotonation energy, whereas this magnitude is quite insensitive to the inclusion of resonance electron donors. The electron density rearrangement accompanying the deprotonation is apparently in line with the predictions of the resonance model (RM). In fact, a significant part of the electron density gained by expelling the proton is transferred to cyano N and to other groups where significant resonance structures delocalize the negative charge. Nevertheless, some significant modifications have to be introduced on the RM picture when the QTAIM results are studied in detail. © The Author(s) 2023 |
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9 |
title_short |
Electron density analysis on the alpha acidity of nitriles |
url |
https://dx.doi.org/10.1007/s00214-023-03022-8 |
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Teixeira, Filipe Graña, Ana M. Mosquera, Ricardo A. |
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Teixeira, Filipe Graña, Ana M. Mosquera, Ricardo A. |
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doi_str |
10.1007/s00214-023-03022-8 |
up_date |
2024-07-03T14:45:51.398Z |
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|
score |
7.400093 |