SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF PHENOXARSIN-10-YL DITHIOCARBAMATES - O(C6H4)(2)ASS2CN(CH2CH2)2, A COMPOUND CONTAINING AN ASYMMETRIC MONONUCLEAR BICONNECTIVE 1,1-DITHIOLATO LIGAND

Phenoxarsin-10-yl dithiocarbamates O(C6H4)(2)AsS(2)CX (X = NMe(2), NEt(2), N(CH2CH)(2), N(CH2CH2)(2) or N[(CH2)(3)CH(CH3)CH2]) have been prepared by the reaction between O(C6H4)(2)AsCl and sodium dithiocarbamates. The compounds were characterized by IR, mass and NMR (H-1 and C-13) spectroscopy. The molecular structure of O(C6H4)(2)AsS2CN(CH2CH2)(2) was determined using single-crystal X-ray diffraction. The compound is monomeric and contains an asymmetric monometallic biconnective dithiocarbamato unit (As-S(1), 2.277(1), Angstrom; As...S(2), 3.183(3) Angstrom. The double-bond character of the C-N bond (1.318(5) Angstrom) is in agreement with the NMR data. The dihedral angle (155.2 degrees) of the phenoxarsine moiety is almost unaffected by substitution of chlorine by the dithiocarbamato ligand.