Moessbauer studies of magnetic and crystal field properties in Fe(III) mixed chelates

Moessbauer studies were performed on mixed Fe(III) complexes with two ligands, one of the ligands being N,N-ethylene bis(salicyladimine) and the other N,N-dialkyldithiocarbamate. Moessbauer spectra were measured of four complexes with the dialkyl end group being N-ethyl2, N-butyl2, pyrrolidyl and piperidyl, respectively. Evaluation and comparison of the spectra and the relaxation patterns indicate that the size of the axial zero field splitting constant and consequently the spin of the ground state Kramer's doublet depends on the type of the alkyl group in the N,N-dialkyldithiocarbamate ligand. (A.K.)