COBALT(II) AND NICKEL(II) COMPLEXES WITH 1,1-BIS(DIPHENYLPHOSPHINOMETHYL)-1-DIPHENYLPHOSPHINOETHYLETHANE, atriphos, AND 1,1,1-TRIS(DIETHYLPHOSPHINOMETHYL)ETHANE, etriphos. CRYSTAL STRUCTURES OF THE TRINUCLEAR COMPLEXES AND *2CHCl3

Article abstract of DOI:10.1016/S0022-328X(00)93593-9

The coordination behaviour of the novel ligand 1,1-bis(diphenylphosphinomethyl)-1-diphenylphosphinoethylethane, CH3C(CH2PPh2)2CH2CH2PPh2, atriphos, and of the ligand 1,1,1-tris(diethylphosphinomethyl)ethane, CH3C(CH2PEt2)3, etriphos, toward cobalt(II) and nickel(II) chlorides has been investigated.The crystal and molecular structures of the complexes (1) and *2 CHCl3 (4) have been determined by standard X-ray methods.Crystal data for 1: orthorombic space group P2₁2₁2, a = 27.309(10), b = 11.243(7), c = 13.927(7) Angstroem, Z = 2, R = 0.055.The structure consists of a non-linear trinuclear system of four-coordinate cobalt atoms each linked to two chlorine atoms and to two phosphorus atoms in a slightly distorted tetrahedral arrangement.Crystal data for 4: monoclinic,space group P2₁/n, a = 13.460(8), b = 23.359(10), c = 9.439(7) Angstroem, β = 99.2(1) deg, Z = 2, R = 0.074.The structure consists of a linear trimeric array of nickel atoms,. each square planar coordinated by two chlorine atoms and by two phosphorus atoms.