3898-65-5

Basic information

• Product Name: triphenoxysilane
• Synonyms: benzene, 1,1',1''-[silylidynetris(oxy)]tris-; Triphenoxysilane
• CAS NO: 3898-65-5
• Molecular Formula: C₁₈H₁₆O₃Si
• Molecular Weight: 308.4033
• Mol File: 3898-65-5.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 339.91°C at 760 mmHg
• Flash Point: 159.372°C
• Vapor Pressure: 0mmHg at 25°C
• CAS DataBase Reference: triphenoxysilane(CAS DataBase Reference)
• NIST Chemistry Reference: triphenoxysilane(3898-65-5)
• EPA Substance Registry System: triphenoxysilane(3898-65-5)

Safety Data

• Hazardous Substances Data: 3898-65-5(Hazardous Substances Data)

Upstream product

• 10025-78-2 trichlorosilane 
• 108-95-2 phenol 
• 74-85-1 ethene 

Downstream Products

• 127233-00-5 u-1,2-dibromo-1-(triphenoxysilyl)-2-phenylethane 
• 127233-00-5 l-1,2-dibromo-1-(triphenoxysilyl)-2-phenylethane 
• 127232-97-7 (E)-β-(triphenoxysilyl)styrene 
• 126629-64-9 C₂₁H₂₄O₃Si₂ 

Relevant articles and documents

Selective synthesis of triphenoxysilane by the reaction of metallic silicon with phenol using copper(I) chloride as the catalyst

When copper(1) chloride was used as a catalyst in the reaction of silicon with phenol, a high selectivity for triphenoxysilane (HSi(OPh)3) (94%) was obtained, the other product being tetraphenoxysilane (Si(OPh)4). Addition of a small amount of propyl chloride to the feed for poisoning metallic copper enhanced the selectivity for HSi(OPh)3 without affecting the rate of silicon consumption. This result indicates that HSi(OPh)3 is an exclusive primary product and that Si(OPh)4 is formed by the secondary reaction between HSi(OPh)3 and phenol. The reaction mechanism involving surface silylene intermediate is proposed for the formation of HSi(OPh)3 as the sole primary product. The intermediacy of surface silylene was confirmed by adding ethylene in the silicon-phenol reaction to give rise to the trapped product ethyldiphenoxysilane, obtained in a 5.8% selectivity.