Local and distant P-31 ENDOR studies of powdered samples of bis(O,O '-disubstituted-dithiophosphinato)copper(II) complexes magnetically diluted in corresponding Ni(II), Pd(II) and Pt(II) host lattices

The present paper reports the results obtained with the method of "polycrys talline ENDOR crystallography" of P-31 transitions of some bis(disubstitute d-dithiophos-phinato)copper(II) complexes, magnetically diluted in the corr esponding Ni(II), Pd(II) and Pt(II) host lattices. Two distinct types of P- 31 ENDOR transitions have been detected for all samples - local P-31 (A(iso ) ca. 17 MHz and A(aniso) ca, 0.7 MHz), and distant P-31 (A(iso) ca, 0.9 MH z and A(aniso) ca. 0.2 MHz). Data confirm that the principal directions of both P-31 coupling tensors coincide, Conclusion on the cases of arising dis tant ENDOR transition pairs is made on the basis of ENDOR, single crystal E PR and X-ray data.