SPECIAL PROPERTIES IMPARTED TO THE 9-PHOSPHABICYCLONONATRIENE SYSTEM BY A P-(2,4,6-TRI-t-BUTYLPHENYL) SUBSTITUENT; (17)O NMR SPECTRUM OF A BICYCLIC PHOSPHIRANE OXIDE

Article abstract of DOI:10.1016/S0040-4039(00)95915-X

9-(2,4,6-Tri-t-butylphenyl)-9-phosphabicyclo<6.1.0>nona -2,4,6-triene gave an observable P-oxide with t-butyl hydroperoxide.Decomposition occurred by expulsion of the phosphorus fragment, possibly as ArP=O, rather than by the expected ring expansion to a phosphonin oxide.The (17)O NMR shift of 18.0 is the most upfield known for a phosphine oxide.