Methyl group exchange reactions of trimethylaluminium dimer

Abstract

Variable temperature susceptibility measurements have been made on a number of bis(N,N-dialkylmonothiocarbamato)nickel(II) complexes. The results are characteristic of ferromagnetically coupled Ni^II clusters. Within the range 300-80 K the susceptibilities can be fitted extremely well to a number of possible cluster models and it is not possible to distinguish the exact molecularity.     Measurements on one of the complexes down to liquid helium temperatures confirm the ferromagnetic behaviour and demonstrate inter- cluster interaction at very low temperatures. The magnetic behaviour of these complexes contrasts with the diamagnetism of the square planar bis(N,N-dialkyldithiocarbamato) analogues.