Figure 14. Delocalisation of nitrogen lone pair and steric hindrance and its influence on pKHB values. The curly arrows indicate resonance flow

From

It Is Important to Compute Intramolecular Hydrogen Bonding in Drug Design?

María J. R. Yunta

American Journal of Modeling and Optimization. 2017, 5(1), 24-57 doi:10.12691/ajmo-5-1-3