A new synthetic route to transition metal complexes of unsymmetrically substituted dithiolenes: evidence for a metalladithiolene ring current

Abstract

Alkaline hydrolysis of 2-N,N-diethylamino-4-phenyl-1,3-dithiolium hydrogen sulphate {[[graphic omitted]NEt₂][HSO₄]} in the presence of a metal complex has been used to prepare [M{S(Ph)CC(H)S}₃]^n–(M = Mo, W; n= O:M = V, n= 1) complexes; ¹H n.m.r. studies of these systems have shown that the metalladithiolene ring sustains a diamagnetic ring current.