3J(P,C) Couplings in 3-Phosphabicyclo[3.1.0]Hexane 3-Oxides

Abstract Vicinal phosphorus-carbon carboncouplings (3J(P,C)) measured for 3-phosphabicyclo [3.1. O] hexane 3-oxides (1 and 2) of known geometry have been studied. With one exception (see below), the dependence of the 3J(P,C) constants on the torsion angles (⊘) followed the Karplus-equation (3J(P,C)=Acos2⊘+Bcos⊘+C).