NEW NONGEMINAL CYCLOPHOSPHAZENES

A series of new nongeminally-substituted cyclic phosphazenes with various substituents has been prepared via deprotonation-substitution reactions at the Me groups of both the cis and trans isomers of [(Me)(Ph)PN] 3 . Treatment of [(Me)(Ph)PN] 3 with n-BuLi followed by reaction with organic electroph...

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Bibliographic Details
Published in:Phosphorus, sulfur, and silicon and the related elements sulfur, and silicon and the related elements, 2004-04, Vol.179 (4-5), p.817-820
Main Authors: Wisian-Neilson, Patty, Jung, June-Ho, Potluri, Srinagesh K., Mauldin, Clayton E., Zhang, Hongming
Format: Article
Language:English
Subjects:
Nanoparticles
nongeminal
phosphazene
P─C substituents
tetramer
trimer
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Summary:A series of new nongeminally-substituted cyclic phosphazenes with various substituents has been prepared via deprotonation-substitution reactions at the Me groups of both the cis and trans isomers of [(Me)(Ph)PN] 3 . Treatment of [(Me)(Ph)PN] 3 with n-BuLi followed by reaction with organic electrophilic reagents affords a variety of cyclic derivatives, [(RCH 2 )(Ph)PN] 3 , [R = Me, Cl, Br, I, (CH 2 ) 2 Br, CH 2 CH═CH 2 , SR, C(═O)OLi, C(═O)OMe, C(═O)OEt]. The structures of theses cis cyclic phosphazenes, which were obtained by x-ray diffraction, illustrate the basket-like shape of the molecules. Heating the cis and trans isomers of the parent [(Me)(Ph)PN] 3 produced mixtures of cyclic trimers and tetramers. The latter were isolated and characterized by x-ray crystallography. Nanoparticles of gold and silver were prepared by reduction of metal salts with a reducing agent in the presence of selected trimers.
ISSN:1042-6507
1563-5325
DOI:10.1080/10426500490427222