REACTIONS OF (DIETHYLDITHIOCARBAMATO)HALOGENOTELLURIUM(II) CRYSTAL-STRUCTURES OF R[TE(S(2)CNET(2))X(2)] [R=NET(4), X=I, R=H(PHEN)(2) (PHEN=1,10-PHENANTHROLINE), X=I OR BR]

The reactions of (diethyldithiocarbamato)halogenotellurium(II) with th iourea, benzimidazole-2-thiol, halides (Cl-, Br-, I-) and 1,10-phenant hroline (phen) have been studied. The products were principally charac terized by elemental analyses, IR and H-1 NMR spectroscopies. Novel an ionic (diethyidithiocarbamato)dihalogenotellurate(II) complexes result ed from the reactions of Te(S(2)CNEt(2))X (X = Br or I) with NEt(4)X ( X = Br or I) and phen. The crystal structures of the complexes [NEt(4) ][Te(S(2)CNEt(2))I-2], [H(phen)(2)][Te(S(2)CNEt(2))I-2] and [H(phen)(2 )][Te(S(2)CNEt(2))Br-2] have been determined. In the anions tellurium is co-ordinated to two sulfur atoms of the dithiocarbamate in an almos t isobidentate manner and to two halides in an overall planar trapezoi dal geometry. In [NEt(4)][Te(S(2)CNEt(2))I-2] the two iodides are almo st equidistant to tellurium with distances of 3.079(1) and 3.072(1) An gstrom, whereas in [H(phen)(2)][Te(S(2)CNEt(2))I-2] the two Te-I dista nces are 3.151(1) and 3.038(1) Angstrom and in [H(phen)(2)][Te(S(2)CNE t(2))Br-2] the two Te-Br distances are 2.911(1) and 2.986(1) Angstrom. In [H(phen)(2)](+) the proton is bound to one of the nitrogen atoms o f a phenanthroline group and the two phen groups are held together by three hydrogen bonds, of which two are of the interesting type C-H ... N.