Separation of the isomers of oligomethylphenylcyclosiloxanes and determination of their structures by capillary GC-MS

被引：7
|
作者：
Jiang, Kezhi [1 ]
Ni, Yong [1 ]
Qiu, Huayu [1 ]
Li, Meijiang [1 ]
Jiang, Jianxiong [1 ]
Lai, Guoqiao [1 ]
机构：
[1] Hangzhou Teachers Coll, Minist Educ, Key lab Org Chem & Mat Technol, Hangzhou 310012, Peoples R China
来源：
CHROMATOGRAPHIA | 2006年 / 64卷 / 11-12期
关键词：
gas chromatography-mass spectrometry; statistical distribution; cis and trans isomers; oligomethylphenylcyclosiloxanes;
D O I：
10.1365/s10337-006-0086-5
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
Cyclic (MePhSiO)(n), formed by hydrolysis of MePhSiCl2, was analyzed by GC-MS on an HP-5 ms capillary column and separated into two different isomers of 2,4,6-trimethyl-2,4,6-triphenylcyclotrisiloxane (P3), four different isomers of 2,4,6,8-tetramethyl-2,4,6,8-tetraphenylcyclotetrasiloxane (P4), and four different isomers of 2,4,6,8,10-pentamethyl-2,4,6,8,10-pentaphenylcyclopentasiloxane (P5). Statistical distribution of the isomers was observed for every oligomethylphenylcyclosiloxane (P3, P4, and P5) with some steric effects of the phenyl group. Dissociation of the molecular ions was deduced from the mass spectra.
引用
收藏
页码：689 / 694
页数：6
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