Heterogenized Catalysts for Olefin Hydroformylation Containing Cobalt and Palladium-Cobalt Complexes Anchored on Phosphinated SiO2: A 13C Solid-State NMR Study Full article
| Journal |
Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169 |
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| Output data | Year: 1996, Volume: 112, Number: 2, Pages: 217-233 Pages count : 17 DOI: 10.1016/1381-1169(96)00062-3 | ||||
| Tags | 13C NMR, Anchored complexes, Cobalt, Ethylene, Hydroformylation, Mechanism, Palladium, Phosphin ated silica | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | International Science Foundation |
Abstract:
13C solid-state NMR technique with high-power H decoupling was employed to study heterogenized hydroformylation catalysts containing the anchored complexes of general composition ≡Si-P2Co2(CO)6.6 and ≡Si- P2PdCo2(CO)7.8 (where ≡Si-P2 is the diphosphine ligand covalently bonded to a silica surface). The data on the content and state of complexed CO are compared with those obtained earlier by IR. The values of chemical shift anisotropy provide information on the molecular motion of anchored metal carbonyl fragments. Evidence is presented for the fast restricted motion of these fragments which is not typical for the supported metal crystallites. The interaction of CO, H2, and ethylene with the anchored Co and Pd-Co carbonyl complexes were studied to identify the species which might act as intermediates in hydroformylation reaction. During these studies, the resonances attributed tentatively to π-bonded ethylene and surface propionyls were observed. Based on the data obtained, we discuss the mechanism of action of Co and Pd-Co catalysts, as well as the reasons of the observed Pd-Co synergism.
Cite:
Moroz B.L.
, Moudrakovski I.L.
, Likholobov V.A.
Heterogenized Catalysts for Olefin Hydroformylation Containing Cobalt and Palladium-Cobalt Complexes Anchored on Phosphinated SiO2: A 13C Solid-State NMR Study
Journal of Molecular Catalysis A: Chemical. 1996. V.112. N2. P.217-233. DOI: 10.1016/1381-1169(96)00062-3 WOS Scopus РИНЦ ANCAN OpenAlex
Heterogenized Catalysts for Olefin Hydroformylation Containing Cobalt and Palladium-Cobalt Complexes Anchored on Phosphinated SiO2: A 13C Solid-State NMR Study
Journal of Molecular Catalysis A: Chemical. 1996. V.112. N2. P.217-233. DOI: 10.1016/1381-1169(96)00062-3 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Nov 24, 1995 |
| Accepted: | Feb 19, 1996 |
| Published print: | Oct 25, 1996 |
| Published online: | Oct 7, 1998 |
Identifiers:
| Web of science: | WOS:A1996VN81000008 |
| Scopus: | 2-s2.0-0030601567 |
| Elibrary: | 13223293 |
| Chemical Abstracts: | 1996:609265 |
| Chemical Abstracts (print): | 125:309872 |
| OpenAlex: | W2068390733 |