Tris(tert-butoxy)silanethiol is a silicon compound containing three tert-butoxy groups and a rare SiâÂÂSâÂÂH functional group. This colourless compound serves as a hydrogen donor in radical chain reactions. It was first prepared by alcoholysis of silicon disulfide and purified by distillation:
Since 1962 it was thoroughly studied including its acid-base properties and coordination chemistry with metal ions. It coordinates to metal ions via the sulfur and oxygen donor atoms.