Formation of a new class of 7π radicals via sterically induced P-P bond cleavage of the dimers [(CH)2(NR)2P]2.

The 2c-2e- P-P bonded dimers [(CH)2(NR)2P]2 dissociate in solution to give the persistent new 7p radicals [(CH)2(NR)2P]·, which are isoelectronic with the well known S/N thiazolyl radicals. [ABSTRACT FROM AUTHOR]