Thioformaldehyde

Thioformaldehyde is the organosulfur compound with the formula CH₂S. This compound is very rarely observed because it oligomerizes to 1,3,5-trithiane, which is a stable colorless compound with the same formula. Despite its instability under normal terrestrial conditions, the molecule has been observed in the interstellar medium and has attracted much attention for its fundamental nature. The tendency of thioformaldehyde to form chains and rings is a manifestation of the Double bond rule.