(ARENE)OSMIUM TRIHYDRIDE COMPLEXES - SYNTHESIS AND STUDIES OF PROTON PROTON-EXCHANGE COUPLING

被引：41

作者：

HEINEKEY, DM

HARPER, TGP

机构：

[1] Department of Chemistry, Yale University, New Haven

来源：

ORGANOMETALLICS | 1991年 / 10卷 / 08期

关键词：

D O I：

10.1021/om00054a065

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The synthesis of cationic osmium trihydride complexes of the form [(eta-C6H6)Os(L)H3]+ is reported (L = PCy3, PPh3, MPTB). The cations are readily prepared by protonation of the corresponding neutral dihydrides. Efficient synthetic methods have been developed for the preparation of the dihalide precursors. The cationic trihydride complexes are fluxional at room temperature, giving a single resonance for the hydridic protons, but low-temperature H-1{P-31} NMR spectra exhibit well-resolved AB2 or A2B spin systems with large, temperature-dependent values of J(A-B) = 70-370 Hz. These large couplings are attributed to the operation of quantum mechanical exchange coupling between the hydrogen nuclei in these complexes.

引用

页码：2891 / 2895

页数：5

共 23 条

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