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Table 3 AIM Topological Parameters for the BCPs found for the conformers of 4 and 5

From: Intramolecular H-bonding interaction in angular 3-π-EWG substituted imidazo[1,2-a]pyridines contributes to conformational preference

Conformer BCP Interaction ρb 2ρb d (Å)
4a A C5-H···O=N 0.019 0.070 2.197
4a B Ph-H···N=O 0.015 0.050 2.337
4b C Ph-H···O=N 0.024 0.087 2.029
5a D C5-H···O=C 0.016 0.057 2.254
5a E Ph-H···H-CO 0.009 0.029 2.302
5b F C5-H···H-CO 0.012 0.043 2.027
5b G Ph-H···O=C 0.021 0.076 2.092