IR LINEAR DICHROIC STUDY OF HIGH-SYMMETRY MOLECULES DISSOLVED IN A LIQUID-CRYSTAL SOLVENT .1. CARBON TETRABROMIDE

The specific solvent interactions between solute and solvent molecules are confirmed by studying the splitting of the nu3(F2) band of CBr4 i n isotropic electron donor solvents. This effect is also observed in t he nematic and isotropic phases of the liquid crystal ZLI 1167. The ab ility of CBr4 to form weak donor-acceptor complexes with basic organic compounds suggests that the IR linear dichroism of CBr4 in an anisotr opic solvent will mainly be determined by the contribution of these sp ecific interactions and to a much smaller extent by the local field ef fects.