62725-49-9

Basic information

• Product Name: POLYPHENYLSILSEQUIXOANE)
• Synonyms: POLYPHENYLSILSEQUIXOANE);tetraphenyltetrahydroxycyclotetrasiloxane
• CAS NO: 62725-49-9
• Molecular Formula: (C24H24O8Si4)x
• Molecular Weight: 0
• Mol File: 62725-49-9.mol
• Article Data: 8

Chemical Properties

• Boiling Point: 575.892°C at 760 mmHg
• Flash Point: 302.089°C
• Appearance: /
• Density: 1.363g/cm³
• Vapor Pressure: 0mmHg at 25°C
• Refractive Index: 1.645
• CAS DataBase Reference: POLYPHENYLSILSEQUIXOANE)(CAS DataBase Reference)
• NIST Chemistry Reference: POLYPHENYLSILSEQUIXOANE)(62725-49-9)
• EPA Substance Registry System: POLYPHENYLSILSEQUIXOANE)(62725-49-9)

Safety Data

• Hazardous Substances Data: 62725-49-9(Hazardous Substances Data)

Usage

InChI:InChI=1/C24H24O8Si4/c25-35(26)30-33(21-13-5-1-6-14-21,22-15-7-2-8-16-22)29-34(31-36(27,28)32-35,23-17-9-3-10-18-23)24-19-11-4-12-20-24/h1-20,25-28H

Upstream product

• 98-13-5 Phenyltrichlorosilane 
• 6425-92-9 all-cis-1,3,5,7-tetrahydroxy-1,3,5,7-tetraphenylcyclotetrasiloxane 
• 2996-92-1 phenyl trimethylsiloxane 
• 10581-02-9 phenyltri(n-butoxy)silane 

Downstream Products

• 80446-54-4 r-2,c-4,t-6,t-8-tetrahydroxy-2,4,6,8-tetraphenylcyclotetrasiloxane 
• 80446-55-5 r-2,t-4,c-6,t-8-tetrahydroxy-2,4,6,8-tetraphenylcyclotetrasiloxane 
• 3511-13-5 5,5,7,7,13,13,15,15-octamethyl-1,3,9,11-tetraphenyl<9.5.1.1^3,9>octasiloxane 
• 70145-17-4 2,4,6,8-tetraphenyl-2,4,6,8-tetrakis(trimethylsiloxy)cyclotetrasiloxane 
• 76802-21-6 2,4,6,8-tetraphenyl-4,6,8-tris(trimethylsiloxy)-2-cyclotetrasiloxanol 
• 70127-27-4 1,3,5,7,9,11,13,17-octaphenyl-5,7,13,15,tetrakis(trimethylsiloxy)tricyclo<9.5.1.1^3,9>octasiloxane 

Relevant articles and documents

The influence of hcl concentration on the rate of the hydrolysis–condensation reaction of phenyltrichlorosilane and the yield of (Tetrahydroxy)(tetraphenyl) cyclotetrasiloxanes, synthesis of all its geometrical isomers and thermal self-condensation of the

The rate of hydrolysis–condensation reaction of phenyltrichlorosilane in water-acetone solutions and the product yields were shown to significantly depend on the concentration of HCl (CHCl) in the solutions. The main product of the reaction was all-cis-(t

Synthetic application of silicates/silanolates and their hydrolyzed polysilanol siloxanes for polyhedral oligomeric silsesquioxanes (POSSs)

Several types of silicate and their hydrolyzed polysilanols were applied to the synthesis of polyhedral oligomeric silsesquioxanes (POSSs). Silicate cubic octasilicate [Si8O20]8? 5 was silylated with trimethylchlorosilane to yield the incompletely trimethylsilylated cubic octasilicate [Si8O20](SiMe3)7H 1b bearing one silanol in addition to the totally trimethylsilylated derivative [Si8O20](SiMe3)8 1a. Further silylation of the monosilanol 1b with dimethylchlorosilane and α,ω-hydridochlorooctamethyltetrasiloxane resulted in the formation of POSSs 1c,d, which have hydrosilyl groups as elongated siloxane side chain. Attempts to generate an amino-substituted POSS via chloromethyldimethylsilylation of silicate 5 followed by reaction with amine as well as lithium amide failed. Amino-substitution was accomplished via the use of amine as a catalyst for the capping reaction of incompletely condensed trisilanol 10b with γ-aminopropyltrimethoxysilane affording mono amino-functionalized POSSs 2b,c in moderate yields. Another group of silanolates 7-9 was hydrolyzed with AcOH or HCl to give the corresponding cyclic polysilanol siloxanes 11a-c, respectively. Amine-catalyzed condensation of several of these polysilanol siloxanes 11a-c resulted in the formation of POSSs in high yields depending on the structure of substrates.

Cyclic tetrasiloxanetetraols: Formation, isolation, and characterization

Hydrolysis of trialkoxysilanes having various substituents gave cyclic tetrasiloxanetetraols with all-cis isomer as the major fraction in the presence of equimolar amounts of water and sodium hydroxide. All stereoisomers of phenyl derivative were produced