P₆<i>t</i>Bu₄O and P₇<i>t</i>Bu₅O— the First Polycyclophosphane Oxides

Abstract

In the oxidation of polycyclophosphanes, oxygen is bound exocyclically and is not inserted into the PP bonds. The P skeleton of the educts remains intact during the oxidation. l a and its isomer, with oxygen on P3 of the five-mem-bered ring, and 2a and 2b are obtained from P6,tBu4, and P,tBu, respectively. Proof of the constitution of the compounds followed from the 31P{1H}-NMR spectra, which could be taken from an NMR handbook.