Supported cyclopentadienylmetal carbonyl complexes : III. Silica-gel-supported iron and cobalt derivatives

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1978
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Wild, Ferdinand R. W. P.
Gubitosa, Guiseppe
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Mononuclear cyclopentadienylcobalt carbonyl and cyclopentadienyliron carbonyl derivatives were covalently linked to a silica gel support either by reaction of (C2H5O)Si(CH3)2C5H5 or of (C2H5O)3SiC5H5 with macroporous silica gel supported materials and subsequent treatment with Co2(CO)8 or Fe2(CO)9 or by reaction of (C2H5O)Si(CH3)2C5H4Co(CO)2 and (C2H5O)3SiC5H4Co(CO)2 with a silica gel support. In contrast to their unsupported analogues, no bi- nuclear or polynuclear species are formed from the SiO2-supported metal carbonyl derivatives even at temperatures up to 200°C. The cobalt derivative was found to be a catalyst for olefin hydroformylation reactions. Binuclear SiO2-supported species are formed when [(C2H5O)Si(CH3)2C5H4Fe- (CO)2]2 or [(C2H5O)3SiC5H4Fe(CO)2]2 are treated with a silica gel support. A large fraction of these surface-bound dimers are irreversibly converted into mononuclear hydridoiron carbonyl derivatives by hydrogen at elevated pressures.

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ISO 690WILD, Ferdinand R. W. P., Guiseppe GUBITOSA, Hans-Herbert BRINTZINGER, 1978. Supported cyclopentadienylmetal carbonyl complexes : III. Silica-gel-supported iron and cobalt derivatives. In: Journal of Organometallic Chemistry. 1978, 148(1), pp. 73-80. ISSN 0022-328X. Available under: doi: 10.1016/S0022-328X(00)90952-5
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@article{Wild1978Suppo-23911,
  year={1978},
  doi={10.1016/S0022-328X(00)90952-5},
  title={Supported cyclopentadienylmetal carbonyl complexes : III. Silica-gel-supported iron and cobalt derivatives},
  number={1},
  volume={148},
  issn={0022-328X},
  journal={Journal of Organometallic Chemistry},
  pages={73--80},
  author={Wild, Ferdinand R. W. P. and Gubitosa, Guiseppe and Brintzinger, Hans-Herbert}
}
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    <dcterms:abstract xml:lang="eng">Mononuclear cyclopentadienylcobalt carbonyl and cyclopentadienyliron carbonyl derivatives were covalently linked to a silica gel support either by reaction of (C&lt;sub&gt;2&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;O)Si(CH&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt; or of (C&lt;sub&gt;2&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;O)&lt;sub&gt;3&lt;/sub&gt;SiC&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt; with macroporous silica gel supported materials and subsequent treatment with Co&lt;sub&gt;2&lt;/sub&gt;(CO)&lt;sub&gt;8&lt;/sub&gt; or Fe&lt;sub&gt;2&lt;/sub&gt;(CO)&lt;sub&gt;9&lt;/sub&gt; or by reaction of (C&lt;sub&gt;2&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;O)Si(CH&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;Co(CO)&lt;sub&gt;2&lt;/sub&gt; and (C&lt;sub&gt;2&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;O)&lt;sub&gt;3&lt;/sub&gt;SiC&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;Co(CO)&lt;sub&gt;2&lt;/sub&gt; with a silica gel support. In contrast to their unsupported analogues, no bi- nuclear or polynuclear species are formed from the SiO&lt;sub&gt;2&lt;/sub&gt;-supported metal carbonyl derivatives even at temperatures up to 200°C. The cobalt derivative was found to be a catalyst for olefin hydroformylation reactions. Binuclear SiO&lt;sub&gt;2&lt;/sub&gt;-supported species are formed when [(C&lt;sub&gt;2&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;O)Si(CH&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;Fe- (CO)&lt;sub&gt;2&lt;/sub&gt;]&lt;sub&gt;2&lt;/sub&gt; or [(C&lt;sub&gt;2&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;O)&lt;sub&gt;3&lt;/sub&gt;SiC&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;Fe(CO)&lt;sub&gt;2&lt;/sub&gt;]&lt;sub&gt;2&lt;/sub&gt; are treated with a silica gel support. A large fraction of these surface-bound dimers are irreversibly converted into mononuclear hydridoiron carbonyl derivatives by hydrogen at elevated pressures.</dcterms:abstract>
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