3450-18-8Relevant academic research and scientific papers
Cyclic tetrasiloxanetetraols: Formation, isolation, and characterization
Ito, Ryuichi,Kakihana, Yuriko,Kawakami, Yusuke
, p. 364 - 365 (2009)
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
Synthetic application of silicates/silanolates and their hydrolyzed polysilanol siloxanes for polyhedral oligomeric silsesquioxanes (POSSs)
Kawakami, Yoshiteru,Seino, Hirofumi,Ohtaki, Kazushi,Kabe, Yoshio
, (2017/06/27)
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.
Composition, insulating film and process for producing the same
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Page/Page column 13-14, (2008/06/13)
A composition comprising at least one of a compound represented by formula (I); a hydrolysate of the compound represented by formula (I); and a condensate of the compound represented by formula (I) and the hydrolysate of the compound represented by formula (I): wherein R1 represents a hydrogen atom or a substituent; R2 represents a hydrogen atom, an alkyl group, an aryl group, an acyl group, an arylcarbonyl group, a group having a quaternary ammonium atom or a metal atom; and m represents an integer of from 6 to 30.
