Abstract

The tautomeric equilibrium of 2-azido-1, 3,4-thiadiazole and [1,3,4] thiadiazolo [3,2-e] tetrazole derivatives (5-H, 5-F, 5-Cl, 5-CH3, 5-CH2CH3, 5-NO2, 5-CN) has been investigated using HF, B3LYP and MP2 level of calculation with the 6-311G (d, p) in the gas phase and solution with full geometry optimization. The calculation results demonstrate 2-azido-1, 3, 4-thiadiazole derivatives are more stable. In addition variation of dipole moments, charges on atoms, HOMO, LUMO and the interfrontier molecular orbital energy gap are studied.

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