Reactivity of [M(CO) 3(NN)(thioureas)] (M = Mo, W; NN = 2,2′bipyridine, 1,10-phenanthroline) complexes towards systems with mercury-halides bonds. Trimetallic compounds with XMHgM′X (M′ = Mo, W; X = Cl, Br, I) bondings

Abstract

New heterotrimetallic complexes were isolated by reaction of M(CO) 3(NN)L (M = Mo, W; NN = bipy, phen; L = thioureas) either with HgX 2 (X = Cl, Br, I) giving complexes of the formula [M(CO) 3(NN)(X)] 2Hg or with M′(CO) 3(NN′)(Cl)(HgCl) (M′ = Mo, W; NN′ = bipy, phen) producing compounds of the type (Cl)(NN)(CO) 3MHgM′(CO) 3(NN′)(Cl). These new photosensitive substances were characterized through IR spectroscopy and conductivity measurements. Structures involving XMHgM′X bonding are proposed and the reactions are discussed in terms of an insertion of the fragment M(CO) 3(NN) into the HgX bonds.