34239-75-3

Basic information

• Product Name: Cyclopentasiloxane, 2,4,6,8,10-pentamethyl-2,4,6,8,10-pentaphenyl-
• Synonyms: Cyclopentasiloxane, 2,4,6,8,10-pentamethyl-2,4,6,8,10-pentaphenyl-;2,4,6,8,10-pentamethyl-2,4,6,8,10-pentakis-phenyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
• CAS NO: 34239-75-3
• Molecular Formula: C₃₅H₄₀O₅Si₅
• Molecular Weight: 0
• Mol File: 34239-75-3.mol
• Article Data: 1

Chemical Properties

• Appearance: /
• CAS DataBase Reference: Cyclopentasiloxane, 2,4,6,8,10-pentamethyl-2,4,6,8,10-pentaphenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Cyclopentasiloxane, 2,4,6,8,10-pentamethyl-2,4,6,8,10-pentaphenyl-(34239-75-3)
• EPA Substance Registry System: Cyclopentasiloxane, 2,4,6,8,10-pentamethyl-2,4,6,8,10-pentaphenyl-(34239-75-3)

Safety Data

• Hazardous Substances Data: 34239-75-3(Hazardous Substances Data)

Upstream product

• 149-74-6 dichloromethylphenylsilane 

Relevant articles and documents

cis-trans-cis-Tetrabromotetramethylcyclotetrasiloxane: A versatile precursor of ladder silsesquioxanes

The title compound was isolated for the first time by a novel procedure including dephenylbromination of cyclotetrasiloxane. The stereostructure of the tetrabromide was confirmed by condensation with diphenylsilanediol, affording anti-tricyclo[7.3.1.13.7]hexasiloxane. This tetrabromide spontaneously decomposed in air to afford a white powder insoluble in organic solvents. Measurements of the TG, IR, and solid-state NMR spectra of the product revealed that a ladder polysilsesquioxane with high thermal stability and stereoregularity was obtained.