Complexes of propyl mercury thiocyanates with cobalt, nickel, and zinc thiocyanate

Abstract

RHgSCN (R = n-C3H7, (iso-C3H7) react with M(NCS)2 (M = Co(II), Ni(II), Zn(II)) to form compounds of general formula (SCN)2M(NCSHgR)2. Conductance measurements and infrared and electronic spectral studies indicate that M and mercury atoms are linked by bridging thiocyanate groups. Cobalt and zinc are tetrahedrally coordinated, whereas nickel is octahedral. With the exception of zinc analogs, these compounds form complexes with Lewis bases. Pyridine and nicotinamide form adducts of general formula L2(SCN)2M(NCSHgR)2, while 2,2′-bipyridine and 1,10-phenanthroline form cationic–anionic complexes of formula [M(L—L)3][RHg(SCN)2]2.