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A carbon-13 NMR study of phenyl-substituted cyclophosphazenes

✍ Scribed by S. S. Krishnamurthy; P. Ramabrahmam; M. Woods

Publisher: John Wiley and Sons
Year: 1981
Tongue: English
Weight: 259 KB
Volume: 15
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270150217

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✦ Synopsis

The -C N M R spectra of the cydotriphosphazenes N3pJcJ6-n Ph. (n= 2,3,4,6) and the telramenc derivatives 2 , 2 , 6 , 6 N . & ' 4 m and N a 4 P k have been recorded. The carbon chemicsl shifts can be largely explained on the basis of concomitant mesomeric electron release from the benzene ring and inductive electron withdrawal by phosphorus. The magnitude of 'J( P, C-1) for the non-geminal compounds is -40 Hz higher than that observed for the geminal compounds. Some aspects of the NMR data are also discussed with reference to the X-ray a y s t a l structures of several phenyl-substituted cydotri-and cydotetra-phosphazenes.

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