Tris(dimethylamino)phosphine Selenide Complexes of Cadmium(II): Synthesis and Multinuclear (31P, 77Se, and 113Cd) NMR Characterization in Solution

Abstract

The complexes CdL4(ClO4)2 (1), CdL2(NO3)2 (2), and CdL2Cl2 (3) (L = (Me2N)3P(Se)) have been prepared and characterized by elemental analysis, conductivity measurements, IR, and multinuclear (31P, 77Se, and 113Cd) NMR spectroscopy. 31P and 77Se NMR data were informative of changes associated with complex formation. The structure of the prepared complexes was further confirmed in solution by their 113Cd NMR spectra, which show a quintuplet for the perchlorate complex and a triplet for each of the nitrate and chloride complexes due, respectively, to coupling with four and two equivalent phosphorus atoms, consistent with a four coordinate tetrahedral geometry for the cadmium center. The NMR data are discussed and compared with those reported for related complexes.