以 1,3 二氯-1,1,3 ,3-四苯基二硅氮烷 (DCTPS)为原料,采用丁基锂脱氯化氢关环法,合成了 1,3-二 (二苯基氯硅烷基 )-2 ,2 ,4,4-四苯基环二硅氮烷 (BcPTPC)。研究发现 ,不同溶剂中所得产物不同。在非极性溶剂中 ,能够顺利地得到BcPTPC ;而在极性溶剂中,得到的产物为DCTPS的低聚体。对于BcPTPC及低聚体,采用1H NMR、²⁹Si-NMR谱及场解吸质谱 (FD)进行了表征。

1,3-bis(chlorodiphenylsilyl)-2,2,4,4-tetraphenylcyclodisilazane (BcPTPC) was synthesized by the ring closure reaction of 1,3-dichloro-1,1,3,3- tetraphenyldisilazane(DCTPS) with BuLi as dehydrochlorination agent. This reaction was highly influenced by the polarity of the solvents used. In non-polar solvents such as xylene hexane mixture solvent, the ring-closure reaction of DCPTPS can smoothly take place, and the BcPTPC yield is nearly 73.2%. In polar solvent such as THF-hexane mixture solvent, the products of the dehydrochlorination reaction are almost the oligomers of DCPTPS. BcPTPC and the oligomers were chatacterized by ¹H-NMR, ²⁹Si-NMR spectrum, and field desorption mass spetrum.