Preparation and molecular structures of some complexes containing C 5 chains

Abstract

Complexes containing a Co 3 cluster linked to SiMe 3, Au(PPh 3), W(CO) 3Cp and Fc groups by a C 5 chain have been prepared by elimination of AuBr(PR 3) (R=Ph, tol) in the reactions between Co 3(μ 3-CBr)(μ-dppm)(CO) 7 and {(R 3P)Au}CCCCX [X=SiMe 3, W(CO) 3Cp] or {(OC) 7(μ-dppm)Co 3}CCC{Au(PPh 3)} and FcCCI (X=Fc). Subsequent auro-desilylation of the SiMe 3 compound affords {(OC) 7(μ-dppm)Co 3}CCCCC{Au[P(tol) 3]}. Single-crystal X-ray structures of the W(CO) 3Cp, Au{P(tol) 3} and Fc complexes are reported. The C 5 chain shows little departure from a formal CCCCC fragment.