Abstract
The dielectric behaviour of polar liquids like isobutanol, tertiary butyl amine and their equimolar binary mixture in nonpolar solvent benzene is studied in the microwave frequency range using the cavity perturbation technique at 6.218 GHz (J band), 9.880 GHz (X band), 16.331 GHz (P band) and 24.951 GHz (K band). Hamiltonian quantum mechanical calculations such as AM1, PM3 and MNDO optimized converged geometry operation is performed on isobutanol, tertiary butyl amine and their equimolar binary mixtures using Argus lab chemical modelling software, 2004. Dipole moments of the binary mixtures are calculated from the dielectric data using Higasi's method, and compared with the theoretical Hamiltonian quantum mechanical results. Conformational analysis of the formation of hydrogen bond between the isobutanol and tertiary butyl amine is supported by FT-IR and proton NMR spectra. The average relaxation times are calculated from their respective Cole–Cole plots.
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