Structure and magnetic properties of bis(diethyldithiocarbamato)manganese(II)

Abstract

A number of N-substituted bis(dithiocarbamato)manganese(II) complexes have been synthesized and their magnetic properties investigated. The X-ray crystal and molecular structure of bis(diethyldithiocarbamato)manganese(II) has been determined by the heavy-atom method from diffractometer data. Crystals are triclinic, space group P1, with a= 11.039(5), b= 10.055(5), c= 7.529(2)Å, α= 70.9(1)°, β= 83.7(1)°. γ= 82.2(1)°. Z= 2. The structure was refined by least-squares techniques to R 0.062 for 1 023 observed reflections. The manganese is co-ordinated by six sulphur atoms in an elongated octahedral environment. Six-co-ordination is achieved through polymerization via sulphur atoms of adjacent planar molecules. The magnetic moment is temperature dependent which suggests a spin-sextet ground state with appreciable antiferromagnetic interactions. The other complexes exhibit similar magnetic properties, and a similar environment for manganese is also suggested for them.