Formation and unexpected catalytic reactivity of organoaluminum boryloxides

Gibson VC; Mastroianni S; White AJP; Williams DJ

Inorganic Chemistry, Vol.40, No.5, 826-827, 2001

Gibson VC, Mastroianni S, White AJP, Williams DJ

The synthesis and structural characterization of mono- and tris-boryloxide complexes of aluminum are described. The mono-boryloxide aluminum species are found to catalyze the conversion of borinic acids to cyclic boroxines (RBO)(3) with elimination of mesitylene (DeltaH(double dagger) 89.1 kJ mol(-1.), DeltaS(double dagger) 145 J mol(-1) K; DeltaG(double dagger) (293 K) 46.7 kJ mol(-1)).