Tris(tert-butoxy)silanethiol is a silicon compound containing three tert-butoxy groups and a rare Si–S–H functional group.

This colourless compound serves as an hydrogen donor in radical chain reactions.

It was first prepared by alcoholysis of silicon disulfide and purified by distillation:[1] Since 1962 it was thoroughly studied including its acid-base properties[2][3] and coordination chemistry with metal ions.

It coordinates to metal ions via the sulfur and oxygen donor atoms.

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