Molecular Nature of the g Anomalies in Bis(diselenocarbamate)copper(II) Complexes

Abstract

It is pointed out that from the measured principal g values in single crystals of bis (diethyldiselenocarbamate) copper (II) it is possible to deduce the g values for the single molecular unit. By a reasonable choice of its principal directions it turns out that the g tensor is axial along the bisecting line of the major angle between the Cu-Se bonds, with g∥ ∼ 2.05 and g⊥ ∼ 2.01. These values seem to confirm the presence, also in the pure Cu crystals, of the main g anomaly, recently observed in the Cu : Ni diluted crystals. Therefore, one can infer that the anomaly is essentially due to the nature of the Cu-Se bonds and not to distortions produced by the Ni diamagnetic matrix.