O,O'-dialkyl, diaryl and alkylene dithiophosphato derivatives of copper(II) and copper(I); adducts of copper(I) dithiophosphates with triphenyl phosphine: crystal and molecular structure of Cu[S<SUB>2</SUB>POCH<SUB>2</SUB>C(CH<SUB>3</SUB>)<SUB>2</SUB>CH<SUB>2</SUB>O] &#183; 2P(C<SUB>6</SUB>H<SUB>5</SUB>)<SUB>3</SUB>

Copper(II) bis(dithiophosphates), Cu[S2P(OR)2]2 (where R =---CH2CH2CH3; ---C6H5) and Cu[S2POGO]2 [where G =---C(CH3) 2CH2CH(CH3),---CH2C(CH3) 2CH2---, ---C(CH3)2C(CH3) 2--- and ---CH2CH2CH(CH3)-], were precipitated from aqueous solutions of CuSO4 &#183; 5H2O and ammonium salts of dithiophosphoric acids and gave on treatment with CH3OH in CH2Cl2 solution the corresponding copper(I) derivatives, which form 1:2 adducts with triphenylphosphine. These compounds have been characterized by molecular weights, magnetic moments, IR, electronic, 1H and 31P NMR spectral measurements. Square planar geometry for the copper(II) complexes and tetrahedral geometry for the copper(I) complexes are suggested. The structure of a representative compound Cu[S2POCH2C(CH3)2CH2O ] &#183; 2P(C6H5)3 has been characterized by single crystal diffraction. Attachment of the dithiophosphato group to copper(I) is almost symmetrical with Cu---Sav = 2.461 &#197; and the overall geometry around the metal is distorted tetrahedral