Dioxomolybdenum(VI) Complexes of Methylpiperidine Dithiocarbamates

Abstract

Three new complexes of dioxomolybdenum(VI) of the general
formula [MoO₂(Rdtc)₂], where Rdtc^- refer to 2-,  3-  or  4-
methylpiperidine (2-, 3-, 4-Mepipdtc) dithiocarbamates, have been
prepared. The complexes have been characterized by elemental
analysis, conductometric measurements, electronic, IR and NMR
spectroscopy. Through contributions of resonance structures which
lead to an effective dianion electronic structure the two dithiocarbamate
ions join with both the sulphurs to the molybdenum atom. The
complexes contain a cis-MoO₂ group and are of octahedral geometry.
The position of the methyl group on the piperidine ring has
influence on the v(C'-'-'N) and v(C'-'-'S) vibrations which decrease
in the order 2-Mepipdtc> 3-Mepipdtc > 4-Mepipdtc.