Thiocarbonate

Thiocarbonate describes a family of anions with the general chemical formula CS3−xO2−x (x = 0, 1, or 2): Like the carbonate dianion, the thiocarbonate ions are trigonal planar, with carbon atom at the center of triangle, and oxygen and sulfur atoms at the peaks of the triangle.

[1][2] Thiocarbonates refer to salts of those ions as well (e.g. potassium trithiocarbonate, K2CS3).

Thiocarbonates refer to esters of those ions as well (e.g. dimethyl trithiocarbonate, (CH3S)2CS).

These salts are typically prepared by the reaction of sodium alkoxides with carbon disulfide.

[5] Esters of thiocarbonic acid, such as Dimethyl trithiocarbonate ((CH3S)2CS) are typically called thioxanthates instead.