MOLECULAR-STRUCTURES OF TRICHLOROVINYL(PARA-TOLYL)NICKEL(II) COMPLEX, AND ITS THERMAL AND PHOTO ISOMERIZATION PRODUCTS

The molecular structure of the trichlorovinyl(p-tolyl)nickel(II) complex (trans-[Ni(CCl = CCl2)(C6H4Me-4)(PMe3)2] (1)), its thermal isomerization product (trans-[NiCl{C(C6H4Me-4) = CCl2}(PMe3)2] (2)) and one of its photolysis products (trans-[NiCl{CCl = CCl(C6H4Me-4)}(PMe3)2] (3)) have been determined by an X-ray diffraction method. Crystal data: 1; triclinic, space group P1BAR, a = 8.768(1), b = 9.347(1), c = 13.029(2) angstrom, alpha = 103.79(2), beta = 96.23(2), gamma = 86.90(3)-degrees, V = 1030.4(3) angstrom 3, Z = 2, D(c) = 1.393 g cm-3, 2; orthorhombic, space group P2(1)2(1)2(1), a = 13.884(2), b = 14.505(3), c = 10.272(2) angstrom, V = 2068.6(6) angstrom 3, Z = 4, D(c) = 1.388 g cm-3, 3; triclinic, space group P1, a = 11.628(4), b = 8.975(3), c = 10.437(4) angstrom, alpha = 102.91(3), beta = 99.45(3), gamma = 89.91(4)-degrees, V = 1046.6(7) angstrom 3, Z = 2, D(c) = 1.377 g cm-3. Molecules 2 and 3 were found to contain p-tolyl group on the alpha-carbon and beta-carbon atoms of the vinyl ligand, respectively. Intersting structural deformations were found in 1.