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Photolysis of 7-(2,4,6-trialkylphenyl-)7-phosphanorbornene 7-oxides in the presence of protic species

✍ Scribed by György Keglevich; Krisztina Ludányi; Louis D. Quin

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 169 KB
Volume: 8
Category: Article
ISSN: 1042-7163
DOI: 10.1002/(sici)1098-1071(1997)8:2<135::aid-hc5>3.0.co;2-d

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✦ Synopsis

Irradiation

of 7-(2,4,6-trialkylphenyl-)

7-phosphanorbornene 7-oxides at 254 nm in the presence of alcohols or water led to H-phosphinic acid derivatives. The experimental data are consistent with the mechanism established earlier for P-phenyl derivatives, involving a five-coordinate adduct from the interaction of the phosphanorbornene and the protic species which then fragments. There is no evidence that the larger substituent allowed a competing reaction to occur where the first step is unimolecular fragmentation to a two-coordinate phosphoryl species.

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