首页 | 本学科首页   官方微博 | 高级检索  
     


Cyclic sulfur nitrogen compounds and phosphorus reagents: Part XII. Reactions of S4N4 with (2-pyridylamino) phosphines [1]
Authors:T. Mohan  C. J. Thomas  M. N. Sudheendra Rao  G. Aravamudan  Auke Meetsma  Johan C. van de Grampel
Abstract:Tetrasulfurtetranitride, S4N4 reacts with (2-pyridylamino)-diphenylphosphine in MeCN at room temperature to form the cyclotrithiazene (NC5H4NH)-Ph2PN S3N3 ( 1 ) in good yield. By contrast, the cyclophosphathiazenes Ph2PS2N3 ( 2 ) and 1,5(Ph2P)2S2N4 ( 3 ) are isolated from the same reaction mixture under reflux conditions. In solution, compound 1 is found to be transformed into 2 . The reaction of S4N4 with (2-pyridylamino)phenyl(dicyclohexylamino)phosphine in MeCN at room temperature affords Ph(DCA)PS2N3 ( 4 ) (DCA = dicylohexylamino) as the only reaction product. This on treatment with norbornadiene produces the addition product Ph(DCA)PS2N3·C7H8 ( 5 ). The structure of 4 has been established by X-ray diffraction. Its PSN ring adopts a skew boat conformation with S N bond lengths varying from 1.574(4) to 1.606(4) Å. The mean value of the endocyclic P N bonds amounts to 1.618(3) Å.
Keywords:
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号