Z. Jing
2003
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Journal
Journal of Beijing University of Chemical Technology
Abstract
Reaction of octamethylcyclotetrasilazane with Ph 2SiCl 2 was carried out at temperature of 190~210?℃, and the mixture product was dissolved by n hexane. By filtrating, 1,3 dichloro 1,1,3,3 tetraphenyldisilazane(DCTPS)(Ⅰ) and filtrate(Ⅱ) were obtained. After distilling the solvent, filtrate(Ⅱ) was conducted a reaction at 260?℃ under reduced pressure of 5?065?Pa, and a distilled mixture (Ⅲ) was collected and a residue mixture was remained. The components of the residue mixture as well as the aminolysis products of the distilled mixture (Ⅲ), and filtrate(Ⅱ) were characterized by 1H NMR, 29 Si NMR spectrum and field desorption (FD) mass spectrum. From the results, it was found that the reaction of OMCT with Ph 2SiCl 2 was very complicated, and DCTPS and other compounds were formed through different breaking modes of Si-N bonds in OMCT and different exchange reactions of -Me 2Si- groups with -SiPh 2- groups. Further reaction of filtrate(Ⅱ) formed 20 3% hexaphenylcyclotrisilazane(HPCT) and some amount of DCTPS, Ph 2SiCl 2, Me 2SiCl 2 and so on.