Molecular packing in the crystal structures of mixed-ligand complexes [ZnPhen{(i-C4H9)(2)PS2}(2)] and [Zn(2,2 '-bipy){(i-C4H9)(2)PS2}(2)]

Volatile mixed-ligand complexes of Zn(i-Bu2PS2)(2) with Phen and 2,2'-Bipy have been synthesized. The crystal structures of the complexes ZnPhen{(i-C4 H9)(2)PS2}(2) and Zn(2,2'-Bipy){(i-C4H9)(2)PS2}(2) were determined by singl e crystal X-ray diffractometry (CAD-4 diffractometer; MoKalpha radiation, 2 100 F-hkb, R = 0.0423 for the first complex and 2003 F-hkb, R = 0.0486 for the second). The crystals are monoclinic with cell dimensions a = 17.580(4) , b = 9.969(2), c = 19.175(4) Angstrom, beta = 90.33(3)degrees, V = 3360(1) Angstrom (3), Z = 4, d(calc) = 1.313 g/cm(3), space group P2/n (for the Ph en complex); a = 24.219(5), b = 11.386(2), c = 24.916(5) Angstrom, beta = 9 7.70(3)degrees, V = 6809(2) Angstrom (3), Z = 8, d(calc) = 1.249 g/cm(3), s pace group C2/c (for the 2,2'-Bipy complex). The complexes are constructed from discrete monomer molecules. The coordination polyhedra of the Zn atoms are distorted tetrahedra formed by two S atoms of the two monodentate i-Bu 2PS2- ligands and two N atoms of the cyclic bidentate Phen or 2,2'-Bipy mol ecules. Intermolecular interactions and packings in the structures are anal yzed.