Polarizability and magnetizability anisotropies of trimethylboroxine, Me3B3O3.: Comparison of boroxine and benzene ring systems

Measurements of the Rayleigh depolarization ratio (with and without inclusion of the vibrational Raman contribution) and the temperature dependence of the Cotton–Mouton effect of gaseous trimethylboroxine at 632.8 nm are analyzed to obtain experimental values of the polarizability and magnetizability anisotropies of this species. The polarizabilities and magnetizabilities of trimethylboroxine (Me3B3O3) and the symmetrically trimethylated benzene (Me3C6H3) are contrasted, and it is inferred that electron delocalization is substantially reduced, possibly even absent, in boroxine as compared to benzene.