Synthesis and characterization of one-dimensional and molecular M(tren)InAsS4 (M = Mn, Co, and Zn) compounds with a noncondensed AsS33- unit

Abstract

Four transition-metal-amine complexes incorporating indium thioarsenates with the general formula M(tren)InAsS4 (M=Mn, Co, and Zn) and a noncondensed AsS33- unit have been prepared and characterized. Single-crystal-X-ray diffraction analyses show that compound 1 (M=Mn) crystallizes in the triclinic crystal system (space group: Pl̄) and consists of a one-dimensional (1 D) inorganic 1∞{[InAsS4]2-} cnain ancl [Mn(tren)] 2+ groups bonded to the opposite sides of an eight-membered In 2As2S4 ring along the backbone of the infinite inorganic chains. Compounds 2 (M=Mn), 3 (M=Zn), and 4 (M=Co) are isomorphous molecular compounds. They all crystallize in the monoclinic crystal system (space group: P21/c). The Mn2+ cation of [Mn(tren)] 2+ in 1 has a distorted octahedral environment, while the transition-metal cations of [M(tren)]2+ in the other three compounds locate in trigonal-bipyramidal environments. This difference results in different bonding modes of [M(tren)]2+ to indium thioarsenates between compound 1 and the other three compounds © 2009 American Chemical Society.