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. Author manuscript; available in PMC: 2013 Aug 9.
Published in final edited form as: J Phys Chem B. 2012 Jul 30;116(31):9387–9395. doi: 10.1021/jp305083t

Figure 1.

Figure 1

Atom labeling and computed bond lengths (Å) of imidazole and 4-methylimidzole in the three protonation states. The tautomeric states of neutral 4-methylimidazole are labeled as τ(N1H) and π(N3H) states.