| Abstract: Two arsenic(Ⅲ) complexes with dithiocarbamate ligands, As(S2CNCy2)2I (1) and As(S2CNC6H12)3 (2) were synthesized and structurally characterized by elemental analysed, IR and single crystal X-ray diffraction analysis. Complex 1 crystallizes in the monoclinic system, space group P21/n, with a=1.020 9(4) nm, b=1.468 0(5) nm, c=1.521 8(5) nm, β=92.135(5)°, and Z=4, while complex 2 crystallizes in the trigonal system, space group R3, with a=1.622 1(4) nm, c=2.119 4(6) nm, for hexagonal coordinate, and Z=6. Complex 1 has a mononuclear structure, the central arsenic atom is five-coordinated in a distorted trigonal bipyramid. An additional feature was noted in this structure, i.e. the presence of a short intermolecular As…S distance of 0.351 2(4) nm makes the structure as a weakly-bridged dimmer. In complex 2, The bidentate ligands are chelated to the arsenic atom, forming a coordination polyhedron which can be described as a distorted trigonal antiprism. CCDC: 607955, 1; 624814, 2. |
