The electric dipole moments of three 1-methyl-3-aryl-1,2,3-triazol-4-ylacetamides (1) and of the 1-methyl-3-(p-tolyl)-1,2,3-triazol-4-one (2) were measured in benzene solution at 25 °C, and the orientation of the moment vector in space was determined by the CNDO/2 method. Dipole moment data in connection with charge distribution and electrons in bonds support the mesoionic formulation for (1) and (2).
C. A. Tsoleridis and N. E. Alexandrou, J. Chem. Soc., Perkin Trans. 2, 1985, 1123 DOI: 10.1039/P29850001123
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