Organometallics p. 202 - 205 (1985)
Update date:2022-08-02
Topics:
Hay, Caroline M.
Johnson, Brian F. G.
Lewis, Jack
McQueen, Roderick C. S.
Ralthby, Paul R.
Sorrell, Robert M.
Taylor, Michael J.
The unsaturated clusters Os4(CO)12(AuPR3)2 [PR3 = PEt3 (I), PPh3 (II), PMePh2 (III)] may be prepared by the thermal decarbonylation of Os4(CO)13-(AuPR3)2 [PR3 = PEt3 (IV), PPh3 (V), PMePh2 (VI)] which have been obtained previously by the reaction of [Os4H-(CO)13]- with 2 equiv of Au(PR3)Cl. The former reaction is reversible, and clusters I, II, and III readily add a range of nucleophiles as well as undergoing facile sequential, electrochemical reductions, to [Os4(CO)12-(AuPR3)2]- and [Os4(CO)12(AuPR3)2]2-. The existence of the monoanionic species is confirmed by the observation of an ESR spectrum, while X-ray crystallographic studies on III and IV show open bicapped butterfly and diedge-bridged tetrahedral metal frameworks, respectively.
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