Abstract
The NMR and magnetic susceptibility results of a series of manganese (III) dithiocarbamates have been determined and interpreted using a model where the d4 ion is in a crystal field of octahedral symmetry: the ground electronic state is the E5 state. The true symmetry about the metal ions in dithiocarbamates differs somewhat from octahedral, and the implications of this are discussed. By comparing the NMR results for the iron (III) dithiocarbamate analogs we have shown that the extent of d-electron delocalization depends markedly on the transition metal ion. The variation of the isotropic proton hyperfine interaction constants along the alkyl chain, which reflects the electronic configuration of these complexes, also depends markedly on the transition metal ion.
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