METAL-COMPLEXES OF P(PH-2)CH2(PH-2)PSE - CRYSTAL-STRUCTURE OF [NI(P(PH-2)CH2(PH-2)PSE)(2)]CL-2-CENTER-DOT-2ETOH

The reactions of P(Ph-2)CH2(Ph-2)PSe (dppmSe) with MCl2 species (M = N i, Co or Pd) and with [{M'(COD)Cl)(2)] complexes (M' = Rh or Ir) affor d mononuclear cationic complexes of the type [M(dppmSe-P,Se)(2)]Cl-2 a nd [M'(COD)(dppmSe-P,Se)(2)]Cl. The crystal structure of the nickel de rivative has been solved by X-ray diffraction methods. It consists of square planar complex cations, chloride ions and ethanol molecules hel d together by a network of hydrogen bonds involving also carbon atoms. The chelating behaviour of dppmSe ligand in the Ph and Ir complexes i s indicated by P-31 and Se-77 NMR data. In the case of CuCl2 a redox p rocess takes place yielding [Cu(dppmSe)Cl], which undergoes air oxidat ion to give [Cu-II((CuCl2)-Cl-1[mu-SeC(Ph2PO)(2)])](2)]. (C) 1998 Else vier Science S.A. All rights reserved.