Changes of coordination from four to five or six in the xanthates of nickel, lead, zinc, and cadmium result in a shift towards lower energy of the M-S vibration, a small shift to higher energy of the C-S vibration, and an unexpected large shift to lower frequency of the C-O vibration.

The preparation, properties, and oxidation of potassium methyl to hexyl mono-thiocarbonates and of dipotassium butyl bis(monothiocarbonate) are reported. The oxidation product of the latter is a dimer. Some nickel, lead, copper, and silver complexes were isolated. The ability of monothiocarbonates to form metal complexes lies between alkyl carbonates and dithiocarbonates. Copper(I) ethyl monothiocarbonate is a tetramer.

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The crystal structures of Ni(S2COCH2CH2OCH3)2 and Cd (S2COCH2CH2OCH3)2 have been determined. Crystals Ni(S2COCH2CH2OCH3)2 are orthorhombic, Pbca , with a 7.852(1), b 7.126(2), c 24.963(4)Ǻ, Z 4. Crystals of Cd (S2COCH2CH2OCH3)2 are monoclinic, P21/c, with a 12.712(2), b 4.215(1), c 13.400(2)Ǻ, β 104.60(1)°, Z 2. In both structures the central metal atom is coordinated by the sulfur atoms in a planar arrangement, an unexpected observation for the cadmium compound.

The structure of metal alkoxides has received considerable attention in recent years1-' but polymorphism in this class of compounds has not been reported.Titanium(1v) methoxide was first prepared by Bischoff and Adkins8 by an ester interchange reaction. The product (compound A) is a white insoluble powder. Dunno prepared the methoxide from titanium tetrachloride and methanol in the