EPR of Cu2+ in Cadmium Saccharin [Cd(sac)2(H2O)4]·2H2O and [Cd(sac)2(hydet-en)2] Complexes in Single-Crystal and Powder Forms

Abstract

The electron paramagnetic resonance spectra of Cu2+ in [Cd(sac)<inf>2</inf>(H<inf>2</inf>O)<inf>4</inf>]·2H<inf>2</inf>O and [Cd(sac)<inf>2</inf>(HydEt-en)<inf>2</inf>] (HydEt-en = N-(2-hydroxyethyl)-ethylenediamine) single crystals and powder were examined at room temperature. A detailed study of the spectra of the compounds indicates the replacement of Cd2+ in the host compounds with Cu2+. [Cd(sac)<inf>2</inf>(H<inf>2</inf>O)<inf>4</inf>]·2H<inf>2</inf>O shows the presence of two sites for Cu2+ and [Cd(sac)<inf>2</inf>(HydEt-en)<inf>2</inf>] has a single site. The principal values for the g-tensor and the hyperfine tensor for Cu2+ in the two compounds were obtained. The Cu2+ ion was found to be mostly in the 3d<inf>x2-y2</inf> orbital and the ground-state wavefunction of [Cd(sac)<inf>2</inf>(HydEt-en)<inf>2</inf>] was constructed.