Characteristic coupling constants1J(13C-13C)of some mesoionic methylides contaIning a diphenyltetrazolium ring

摘要

1J(13C-13C)data are presented for some Types A and B tetrazoliwn methylides. The results show a large amoWlt of double bond character for the C5-C6bond which is significantly reduced upon protonation. A similar decrease in bond order is noted for the C6-C8bond following protonation.