Tris(tert-butoxy)silanethiol

Tris(tert-butoxy)silanethiol
IUPAC name Tris(tert-butoxy)silanethiol
Other names Tri(tert-butoxy)silanethiol
Identifiers
Abbreviations	TBST
CAS number	690-52-8 Y
PubChem	5246420
ChemSpider	4414610 Y
Jmol-3D images	{{#if:CC(C)(C)O[Si](S)(OC(C)(C)C)OC(C)(C)C|Image 1
SMILES CC(C)(C)O[Si](S)(OC(C)(C)C)OC(C)(C)C
InChI InChI=1S/C12H28O3SSi/c1-10(2,3)13-17(16,14-11(4,5)6)15-12(7,8)9/h16H,1-9H3 Key: ZVUGYOCGLCLJAV-UHFFFAOYSA-N
Properties
Molecular formula	C12H28O3SSi
Molar mass	280.50 g mol−1
Appearance	Colourless liquid
Boiling point	113 to 115 °C; 235 to 239 °F; 386 to 388 K (at 35 mmHg)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

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 is prepared by alcoholysis of silicon disulfide and purified by distillation:

3 (CH₃)₃COH + SiS₂ → [(CH₃)₃CO]₃SiSH + H₂S