Synthesis and properties of heterotrimetallic complexes containing M–Pt–Hg (M = Mo, W, Fe, Mn, or Co) arrays

Abstract

Heterotrimetallic complexes cis-[m–Pt(PPh₃)₂–Hg(C₆Cl₅)][m = Mo(CO)₃(η-C₅H₅), W(CO)₃(η-C₅H₅), Fe(CO)₂(η-C₅H₅), Mn(CO)₅, or Co(CO)₄] have been prepared by the reaction of trans-[(C₆Cl₅) Hg–PtCl( PPh₃)₂] with the appropriate carbonylmetalate anions. The scope of this reaction is discussed. All the compounds have been characterised by ³¹P n.m.r. spectroscopy. Linear correlations are obtained for plots of the coupling constant ratios ¹J(P_aPt)/²J( P_aHg) or ²J(P_aHg)/²J(P_bHg) against either the nucleophilicity or the oxidation potential of the carbonylmetalate anions.