Monodentate and Bridging Bidentate Functions of Pyrazine in the Crystal Structures of [Ni(Pz)2{(i-C4H9)2PS2}2] and [Ni(Pz){(i-C4H9)2PS2}2]n

Author： Glinskaya L.A. Klevtsova R.F. Kokina T.E. Larionov S.V.

Publisher： Springer Publishing Company

ISSN： 0022-4766

Source： Journal of Structural Chemistry, Vol.42, Iss.6, 2001-11, pp. : 982-988

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

The structures of mixed-ligand complexes [Ni(Pz)_2{(i-C_4H_9)_2PS_2}_2] (I) and [Ni(Pz){(i-C_4H_9)_2PS_2}_2]_n (II) were determined from single-crystal X-ray diffraction data (CAD-4 diffractometer, MoK_{alpha} radiation, 1527 and 2387 F_{hkl}, R = 0.0360 and R = 0.0491). The crystals of both complexes are monoclinic with cell dimensions a = 9.180(2), b = 16.002(3), c = 11.547(2) Å, beta = 104.92(3)°, V = 1639.0(6) Å^3, Z = 2, space group P2_1 / n and a = 30.718(6), b = 11.036(2), c = 19.606(4) Å, beta = 118.90(3)°, V = 5819(2) Å^3, Z = 8, space group C2/c. The crystal structure of I consists of monomer molecules, in which the NiN_2S_4 unit is a compressed octahedron, and the monodentate Pz molecules are in the trans position. The structure of complex II consists of infinite zigzag chains along the c axis. The Ni atom has a distorted octahedral environment (2N+4S). The bridging bidentate Pz molecules are in the cis position. The packing modes and their interactions in the structures are discussed.