SYNTHESIS AND CHARACTERIZATION OF DIMETHYLPHENYLBIS (N,N-DIALKYLDITHIOCARBAMATO)TELLURIUM(IV) AND DIMETHOXYPHENYLBIS(N,N-DIALKYLDITHIOCARBAMATO)TELLURIUM(IV) AND CHLORODIMETHYLPHENYL-(N,N-DIALKYLDITHIOCARBAMATO)TELLURIUM(IV) AND CHLORODIMETHOXYPHENYL-(N,N-DIALKYLDITHIOCARBAMATO)TELLURIUM(IV) - CRYSTAL-STRUCTURES OF ME2TE[S2CNME2]2 AND (P-MEOC6H4)2TE[S2CNME2]2

The compounds Me2Te[S2CNR2]2, Me2TeCl[S2CNR2], (p-MeOC6H4)2Te[S2CNR2]2, and (p-MeOC6H4)2TeCl[S2CNR2], where R = Me, Et, have been prepared and characterised primarily by vibrational and NMR spectroscopy. Variable temperature NMR spectroscopy and qualitative time studies indicate that in solution the dimethoxyphenyltellurium derivatives undergo the reductive-elimination noted for analogous phenyl derivatives but the reductive-elimination does not occur with the dimethyl tellurium derivatives. The crystal structures of Me2Te[S2CNMe2]2, 1, and (p-MeOC6H4)2Te[S2CNMe2]2, 5, were completed. The cell parameters for 1, which crystallizes as monoclinic in space group P2(1)/n, are a = 13.550(2), b = 13.034(2), c = 17.854(2) angstrom, beta = 106.61(1)-degrees, V = 3021.6(7) angstrom3, Z = 8, R = 0.0368, and R(w) = 0.0402 and for 5, which crystallizes as monoclinic in space group C2/c, are a = 35.36(1), b = 11.063(3), c = 12.778(3) angstrom, beta = 96.16(3)-degrees, V = 4963(3) angstrom3, Z = 8, R = 0.0627, and R(w) = 0.0646.