The reaction of (μ-H)2Os3(CO)9(PPh3) with ethylene affords the ethylidene complex (μ-H)2Os3(CO)9(PPh3)(μ-CHCH3) |
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Authors: | Makoto Koike John R. Shapley |
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Affiliation: | Department of Chemistry, University of Illinois, Urbana, IL 61801 USA |
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Abstract: | The product isolated from the reaction of (μ-H)2Os3(CO)9(PPh3) with ethylene is shown to be the ethylidene complex (μ-H)2Os3(CO)9(PPh3)(μ-CHCH3) (1) rather than the ethylene complex (μ-H)(H)Os3(CO)9(PPh3)(C2H4), as previously claimed. The characterization of 1 is based on a combination of 1H and 13C NMR results. The 1H NMR data (δ 6.84 (1 HD), 2.53 (3 HC), J(CD) = 7.4 Hz) establish the presence of the ethylidene moiety, whereas detailed analysis of the 1-D and 2-D 13C NMR spectra of 13CO-enriched 1 indicates the relative positions of the ethylidene, hydride, and phosphine ligands on the triosmium framework. |
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Keywords: | Osmium alkylidene Hydride Carbon-13 Cluster Nuclear magnetic resonance |
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