The Collaborative International Dictionary
Thiocarbonate
Thiocarbonate \Thi`o*car"bon*ate\, n. (Chem.) A sulphocarbonate.
Wiktionary
thiocarbonate
n. (context inorganic chemistry English) Any anion formally derived from a carbonate by replacing one or more oxygen atoms with sulfur; any salt containing such an anion
Wikipedia
Thiocarbonate
Thiocarbonate describes a family of anions with the general chemical formula (x = 0, 1, or 2). Organic compounds structurally related to these anions are also called thiocarbonates.
Like the carbonate dianion, the thiocarbonates are planar, with carbon at the center. The average bond order from C to S or O is . The state of protonation is usually not specified. These anions are good nucleophiles and good ligands.