Site selectivity in carbonyl reduction of mixed Fe"2Co"2 clusters. Formyl intermediates in the formation of hydrido derivatives
The mixed metal cluster Co"2Fe"2(CO)"1"1(μ"4-PPh)"2 (II) undergoes a site-selective reduction of one of the carbonyl ligands by triethylborohydride reagent to afford a single formyl derivative Co"2Fe"2(CO)"1"0(PPh)"2CHO^- (III) in excellent yiel...
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E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1987 |
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| Reproduktion: |
Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 |
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| Übergeordnetes Werk: |
in: Journal of Organometallic Chemistry - Amsterdam : Elsevier, 323(1987), 2, Seite 219-232 |
| Übergeordnetes Werk: |
volume:323 ; year:1987 ; number:2 ; pages:219-232 |
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| 520 | |a The mixed metal cluster Co"2Fe"2(CO)"1"1(μ"4-PPh)"2 (II) undergoes a site-selective reduction of one of the carbonyl ligands by triethylborohydride reagent to afford a single formyl derivative Co"2Fe"2(CO)"1"0(PPh)"2CHO^- (III) in excellent yields at -78^oC. The same terminal CO bound to cobalt also selectively undergoes addition of methyllithium to afford the corresponding acetyl derivative (V). Whereas V is thermally robust at room temperature, the formyl derivative III is a transient species which readily loses carbon monoxide at -30^oC to afford the μ"2-hydride Co"2Fe"2(CO)"1"0(PPh)"2H^- in quantitative yields. All of these site-selective reactions are compared to the corresponding transformations which were previously observed in the homonuclear analogue Co"4(CO)"1"0(μ"4-PPh)"2 (I). The structural similarities of homo- and heteronuclear clusters I and II, respectively, are considered in the context of the fluxional behavior of their bound carbonyl ligands. The comparisons are extended to the IR, ^1H and ^1^3C NMR properties of their formyl, hydrido, and acetyl derivatives. | ||
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(DE-627)NLEJ175036659 (DE-599)GBVNLZ175036659 DE-627 ger DE-627 rakwb eng Site selectivity in carbonyl reduction of mixed Fe"2Co"2 clusters. Formyl intermediates in the formation of hydrido derivatives 1987 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The mixed metal cluster Co"2Fe"2(CO)"1"1(μ"4-PPh)"2 (II) undergoes a site-selective reduction of one of the carbonyl ligands by triethylborohydride reagent to afford a single formyl derivative Co"2Fe"2(CO)"1"0(PPh)"2CHO^- (III) in excellent yields at -78^oC. The same terminal CO bound to cobalt also selectively undergoes addition of methyllithium to afford the corresponding acetyl derivative (V). Whereas V is thermally robust at room temperature, the formyl derivative III is a transient species which readily loses carbon monoxide at -30^oC to afford the μ"2-hydride Co"2Fe"2(CO)"1"0(PPh)"2H^- in quantitative yields. All of these site-selective reactions are compared to the corresponding transformations which were previously observed in the homonuclear analogue Co"4(CO)"1"0(μ"4-PPh)"2 (I). The structural similarities of homo- and heteronuclear clusters I and II, respectively, are considered in the context of the fluxional behavior of their bound carbonyl ligands. The comparisons are extended to the IR, ^1H and ^1^3C NMR properties of their formyl, hydrido, and acetyl derivatives. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Richmond, M.G. oth Kochi, J.K. oth in Journal of Organometallic Chemistry Amsterdam : Elsevier 323(1987), 2, Seite 219-232 (DE-627)NLEJ174930496 (DE-600)1491530-3 0022-328X nnns volume:323 year:1987 number:2 pages:219-232 http://linkinghub.elsevier.com/retrieve/pii/0022-328X(87)80371-6 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 323 1987 2 219-232 |
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(DE-627)NLEJ175036659 (DE-599)GBVNLZ175036659 DE-627 ger DE-627 rakwb eng Site selectivity in carbonyl reduction of mixed Fe"2Co"2 clusters. Formyl intermediates in the formation of hydrido derivatives 1987 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The mixed metal cluster Co"2Fe"2(CO)"1"1(μ"4-PPh)"2 (II) undergoes a site-selective reduction of one of the carbonyl ligands by triethylborohydride reagent to afford a single formyl derivative Co"2Fe"2(CO)"1"0(PPh)"2CHO^- (III) in excellent yields at -78^oC. The same terminal CO bound to cobalt also selectively undergoes addition of methyllithium to afford the corresponding acetyl derivative (V). Whereas V is thermally robust at room temperature, the formyl derivative III is a transient species which readily loses carbon monoxide at -30^oC to afford the μ"2-hydride Co"2Fe"2(CO)"1"0(PPh)"2H^- in quantitative yields. All of these site-selective reactions are compared to the corresponding transformations which were previously observed in the homonuclear analogue Co"4(CO)"1"0(μ"4-PPh)"2 (I). The structural similarities of homo- and heteronuclear clusters I and II, respectively, are considered in the context of the fluxional behavior of their bound carbonyl ligands. The comparisons are extended to the IR, ^1H and ^1^3C NMR properties of their formyl, hydrido, and acetyl derivatives. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Richmond, M.G. oth Kochi, J.K. oth in Journal of Organometallic Chemistry Amsterdam : Elsevier 323(1987), 2, Seite 219-232 (DE-627)NLEJ174930496 (DE-600)1491530-3 0022-328X nnns volume:323 year:1987 number:2 pages:219-232 http://linkinghub.elsevier.com/retrieve/pii/0022-328X(87)80371-6 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 323 1987 2 219-232 |
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(DE-627)NLEJ175036659 (DE-599)GBVNLZ175036659 DE-627 ger DE-627 rakwb eng Site selectivity in carbonyl reduction of mixed Fe"2Co"2 clusters. Formyl intermediates in the formation of hydrido derivatives 1987 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The mixed metal cluster Co"2Fe"2(CO)"1"1(μ"4-PPh)"2 (II) undergoes a site-selective reduction of one of the carbonyl ligands by triethylborohydride reagent to afford a single formyl derivative Co"2Fe"2(CO)"1"0(PPh)"2CHO^- (III) in excellent yields at -78^oC. The same terminal CO bound to cobalt also selectively undergoes addition of methyllithium to afford the corresponding acetyl derivative (V). Whereas V is thermally robust at room temperature, the formyl derivative III is a transient species which readily loses carbon monoxide at -30^oC to afford the μ"2-hydride Co"2Fe"2(CO)"1"0(PPh)"2H^- in quantitative yields. All of these site-selective reactions are compared to the corresponding transformations which were previously observed in the homonuclear analogue Co"4(CO)"1"0(μ"4-PPh)"2 (I). The structural similarities of homo- and heteronuclear clusters I and II, respectively, are considered in the context of the fluxional behavior of their bound carbonyl ligands. The comparisons are extended to the IR, ^1H and ^1^3C NMR properties of their formyl, hydrido, and acetyl derivatives. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Richmond, M.G. oth Kochi, J.K. oth in Journal of Organometallic Chemistry Amsterdam : Elsevier 323(1987), 2, Seite 219-232 (DE-627)NLEJ174930496 (DE-600)1491530-3 0022-328X nnns volume:323 year:1987 number:2 pages:219-232 http://linkinghub.elsevier.com/retrieve/pii/0022-328X(87)80371-6 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 323 1987 2 219-232 |
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(DE-627)NLEJ175036659 (DE-599)GBVNLZ175036659 DE-627 ger DE-627 rakwb eng Site selectivity in carbonyl reduction of mixed Fe"2Co"2 clusters. Formyl intermediates in the formation of hydrido derivatives 1987 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The mixed metal cluster Co"2Fe"2(CO)"1"1(μ"4-PPh)"2 (II) undergoes a site-selective reduction of one of the carbonyl ligands by triethylborohydride reagent to afford a single formyl derivative Co"2Fe"2(CO)"1"0(PPh)"2CHO^- (III) in excellent yields at -78^oC. The same terminal CO bound to cobalt also selectively undergoes addition of methyllithium to afford the corresponding acetyl derivative (V). Whereas V is thermally robust at room temperature, the formyl derivative III is a transient species which readily loses carbon monoxide at -30^oC to afford the μ"2-hydride Co"2Fe"2(CO)"1"0(PPh)"2H^- in quantitative yields. All of these site-selective reactions are compared to the corresponding transformations which were previously observed in the homonuclear analogue Co"4(CO)"1"0(μ"4-PPh)"2 (I). The structural similarities of homo- and heteronuclear clusters I and II, respectively, are considered in the context of the fluxional behavior of their bound carbonyl ligands. The comparisons are extended to the IR, ^1H and ^1^3C NMR properties of their formyl, hydrido, and acetyl derivatives. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Richmond, M.G. oth Kochi, J.K. oth in Journal of Organometallic Chemistry Amsterdam : Elsevier 323(1987), 2, Seite 219-232 (DE-627)NLEJ174930496 (DE-600)1491530-3 0022-328X nnns volume:323 year:1987 number:2 pages:219-232 http://linkinghub.elsevier.com/retrieve/pii/0022-328X(87)80371-6 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 323 1987 2 219-232 |
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(DE-627)NLEJ175036659 (DE-599)GBVNLZ175036659 DE-627 ger DE-627 rakwb eng Site selectivity in carbonyl reduction of mixed Fe"2Co"2 clusters. Formyl intermediates in the formation of hydrido derivatives 1987 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The mixed metal cluster Co"2Fe"2(CO)"1"1(μ"4-PPh)"2 (II) undergoes a site-selective reduction of one of the carbonyl ligands by triethylborohydride reagent to afford a single formyl derivative Co"2Fe"2(CO)"1"0(PPh)"2CHO^- (III) in excellent yields at -78^oC. The same terminal CO bound to cobalt also selectively undergoes addition of methyllithium to afford the corresponding acetyl derivative (V). Whereas V is thermally robust at room temperature, the formyl derivative III is a transient species which readily loses carbon monoxide at -30^oC to afford the μ"2-hydride Co"2Fe"2(CO)"1"0(PPh)"2H^- in quantitative yields. All of these site-selective reactions are compared to the corresponding transformations which were previously observed in the homonuclear analogue Co"4(CO)"1"0(μ"4-PPh)"2 (I). The structural similarities of homo- and heteronuclear clusters I and II, respectively, are considered in the context of the fluxional behavior of their bound carbonyl ligands. The comparisons are extended to the IR, ^1H and ^1^3C NMR properties of their formyl, hydrido, and acetyl derivatives. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Richmond, M.G. oth Kochi, J.K. oth in Journal of Organometallic Chemistry Amsterdam : Elsevier 323(1987), 2, Seite 219-232 (DE-627)NLEJ174930496 (DE-600)1491530-3 0022-328X nnns volume:323 year:1987 number:2 pages:219-232 http://linkinghub.elsevier.com/retrieve/pii/0022-328X(87)80371-6 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 323 1987 2 219-232 |
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Site selectivity in carbonyl reduction of mixed Fe"2Co"2 clusters. Formyl intermediates in the formation of hydrido derivatives |
| abstract |
The mixed metal cluster Co"2Fe"2(CO)"1"1(μ"4-PPh)"2 (II) undergoes a site-selective reduction of one of the carbonyl ligands by triethylborohydride reagent to afford a single formyl derivative Co"2Fe"2(CO)"1"0(PPh)"2CHO^- (III) in excellent yields at -78^oC. The same terminal CO bound to cobalt also selectively undergoes addition of methyllithium to afford the corresponding acetyl derivative (V). Whereas V is thermally robust at room temperature, the formyl derivative III is a transient species which readily loses carbon monoxide at -30^oC to afford the μ"2-hydride Co"2Fe"2(CO)"1"0(PPh)"2H^- in quantitative yields. All of these site-selective reactions are compared to the corresponding transformations which were previously observed in the homonuclear analogue Co"4(CO)"1"0(μ"4-PPh)"2 (I). The structural similarities of homo- and heteronuclear clusters I and II, respectively, are considered in the context of the fluxional behavior of their bound carbonyl ligands. The comparisons are extended to the IR, ^1H and ^1^3C NMR properties of their formyl, hydrido, and acetyl derivatives. |
| abstractGer |
The mixed metal cluster Co"2Fe"2(CO)"1"1(μ"4-PPh)"2 (II) undergoes a site-selective reduction of one of the carbonyl ligands by triethylborohydride reagent to afford a single formyl derivative Co"2Fe"2(CO)"1"0(PPh)"2CHO^- (III) in excellent yields at -78^oC. The same terminal CO bound to cobalt also selectively undergoes addition of methyllithium to afford the corresponding acetyl derivative (V). Whereas V is thermally robust at room temperature, the formyl derivative III is a transient species which readily loses carbon monoxide at -30^oC to afford the μ"2-hydride Co"2Fe"2(CO)"1"0(PPh)"2H^- in quantitative yields. All of these site-selective reactions are compared to the corresponding transformations which were previously observed in the homonuclear analogue Co"4(CO)"1"0(μ"4-PPh)"2 (I). The structural similarities of homo- and heteronuclear clusters I and II, respectively, are considered in the context of the fluxional behavior of their bound carbonyl ligands. The comparisons are extended to the IR, ^1H and ^1^3C NMR properties of their formyl, hydrido, and acetyl derivatives. |
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The mixed metal cluster Co"2Fe"2(CO)"1"1(μ"4-PPh)"2 (II) undergoes a site-selective reduction of one of the carbonyl ligands by triethylborohydride reagent to afford a single formyl derivative Co"2Fe"2(CO)"1"0(PPh)"2CHO^- (III) in excellent yields at -78^oC. The same terminal CO bound to cobalt also selectively undergoes addition of methyllithium to afford the corresponding acetyl derivative (V). Whereas V is thermally robust at room temperature, the formyl derivative III is a transient species which readily loses carbon monoxide at -30^oC to afford the μ"2-hydride Co"2Fe"2(CO)"1"0(PPh)"2H^- in quantitative yields. All of these site-selective reactions are compared to the corresponding transformations which were previously observed in the homonuclear analogue Co"4(CO)"1"0(μ"4-PPh)"2 (I). The structural similarities of homo- and heteronuclear clusters I and II, respectively, are considered in the context of the fluxional behavior of their bound carbonyl ligands. The comparisons are extended to the IR, ^1H and ^1^3C NMR properties of their formyl, hydrido, and acetyl derivatives. |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">NLEJ175036659</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230505211250.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">070505s1987 xx |||||o 00| ||eng c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ175036659</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)GBVNLZ175036659</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Site selectivity in carbonyl reduction of mixed Fe"2Co"2 clusters. Formyl intermediates in the formation of hydrido derivatives</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1987</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">z</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zu</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">The mixed metal cluster Co"2Fe"2(CO)"1"1(μ"4-PPh)"2 (II) undergoes a site-selective reduction of one of the carbonyl ligands by triethylborohydride reagent to afford a single formyl derivative Co"2Fe"2(CO)"1"0(PPh)"2CHO^- (III) in excellent yields at -78^oC. The same terminal CO bound to cobalt also selectively undergoes addition of methyllithium to afford the corresponding acetyl derivative (V). Whereas V is thermally robust at room temperature, the formyl derivative III is a transient species which readily loses carbon monoxide at -30^oC to afford the μ"2-hydride Co"2Fe"2(CO)"1"0(PPh)"2H^- in quantitative yields. All of these site-selective reactions are compared to the corresponding transformations which were previously observed in the homonuclear analogue Co"4(CO)"1"0(μ"4-PPh)"2 (I). The structural similarities of homo- and heteronuclear clusters I and II, respectively, are considered in the context of the fluxional behavior of their bound carbonyl ligands. The comparisons are extended to the IR, ^1H and ^1^3C NMR properties of their formyl, hydrido, and acetyl derivatives.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">Elsevier Journal Backfiles on ScienceDirect 1907 - 2002</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Richmond, M.G.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Kochi, J.K.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">in</subfield><subfield code="t">Journal of Organometallic Chemistry</subfield><subfield code="d">Amsterdam : Elsevier</subfield><subfield code="g">323(1987), 2, Seite 219-232</subfield><subfield code="w">(DE-627)NLEJ174930496</subfield><subfield code="w">(DE-600)1491530-3</subfield><subfield code="x">0022-328X</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:323</subfield><subfield code="g">year:1987</subfield><subfield code="g">number:2</subfield><subfield code="g">pages:219-232</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://linkinghub.elsevier.com/retrieve/pii/0022-328X(87)80371-6</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_H</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-SDJ</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">323</subfield><subfield code="j">1987</subfield><subfield code="e">2</subfield><subfield code="h">219-232</subfield></datafield></record></collection>
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