The room-temp. EPR spectra of the title complex is reported. The hyperfine spectra of the 63Cu and 65Cu, as well as that of 31P in the ligand, are given. The g and A tensors were used to calculate the spin Hamiltonian. The g tensor showed that the 4 ligand-S which is occupied by Cu2+, is tetragonal. The A tensor showed large anisotropy which was related to the ligand P atoms. The interaction between the electron spin and the ligand 31P is isotropic.

Key words: CYCLOHEXANE P, COPPER COMPLEX, SINGLE CRYSTALS, PHOSPHORIC ACID ESTER, ELECTRON SPIN RESONANCE, LEAST SQUARES FITTING, PHOSPHORODITHIOIC ACID P, ISOTROPY