Formation of Phosphorus Oxoacids with P-P-P-P-P-P and P-P-P-P-P Frameworks and Related Compounds

Abstract

The following ten kinds of phosphorus oxoacids with P-P bonds are known at present (1, 2): PIV-PIV, PIV PIV-O-PIV-PIV, (-PIV-PIV -O-)2, PIV-PIV-O-PIII, PIV-PIV-O-PV , PIII-O-PIV-PIV-O-PIII, PII-PII, PII-PIV, PIV-PIII-PIV and (-PIII-)6. Among these compounds we reported the formation of PIII-O-PIV-PIV-O-PIII by the substitution reaction between PIV-PIV and PIII-O-PIII at the ICPC., 1979 (2). The last compound in the above series, (-PIII-)6, was first prepared by Blaser and Worms in 1959 (3). This compound has a six-membered P-P bond ring structure as shown in Formula 1. It has been known that this ring acid is decomposed by hydrolysis into a complicated mixture of various phosphorus oxoacids and finally converted into a mixture of monomeric phosphorus oxoacids; phosphinic acid (hypophosphorous acid, PI), phosphonic acid (phosphorous acid, PIII) and orthophosphoric acid (PV). Therefore, there is a possibility that some new phosphorus oxoacids with P-P bonds may be found in the decomposition products by