Abstract
The title compound appears to be present in solution as one major (98%) and two minor (ca. 1% each) isomers. All three isomers contain one bridging and one terminal hydride ligand. However, they differ in the location of the terminal hydride. Proton T1 measurements at variable temperature have allowed the determination of HT−HB distances in each isomer. An estimation of the relative “hydridicity” of bridging and terminal hydrides has been gained by measuring the T1 of 2H(μ-2H)Os3(CO)11, while insights into the terminal/bridging hydride exchange have been gained from 1H variable-temperature NMR.
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