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 pre pared by the reaction between O(C6H4)(2)AsCl and sodium dithiocarbamat es. 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 i s monomeric and contains an asymmetric monometallic biconnective dithi ocarbamato unit (As-S(1), 2.277(1), Angstrom; As...S(2), 3.183(3) Angs trom. 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 chlor ine by the dithiocarbamato ligand.