A new class of organometallic compound

Abstract

Organometallic compounds of general formula (SCN)2M(NCSeHgR)2 (M=CoII, NiII, R=n-C5H11, i-C5H11) have been prepared. They behave as Lewis acids, forming complexes with pyridine and 2,2′-bipyridyl, characterized by elemental analysis, molecular weight, molar conductance, i.r. spectral (4000-200 cm-1), electronic spectral and magnetic susceptibility measurements. The Lewis acids are monomeric with bridging thiocyanate, or selenocyanate between M2+ and Hg2+. Cobalt and nickel acquire tetrahedral and octahedral configurations respectively through axial bridging, whereas mercury retains its linearity. Pyridine links to the metal in the Lewis acid and forms L2(SCN)2M(NCSeHgR)2 complexes. Bipyridyl ruptures the NCX bridge and forms cationic-anionic [M(bipy)3][(NCS)(NCSe)HgR]2 complexes. © 1990 Chapman and Hall Ltd.