Preparation and Properties of Sterically Protected Diphosphene and Fluorenylidenephosphine Bearing the 2,6-Di-<i>tert</i>-butyl-4-methoxyphenyl Group

Abstract

Abstract A new bulky bromobenzene, 2-bromo-1,3-di-tert-butyl-5-methoxybenzene, was prepared and utilized to preparations of the corresponding diphosphene and fluorenylidenephosphine including low-coordinate phosphorus atom(s). An electronic perturbation of the p-methoxy group in the system was indicated by UV–vis spectra and 31P NMR chemical shifts.