Competing hydrogen-bond donors: phenols vs. cyanooximes
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Based on a systematic structural study of co-crystals of a ditopic probe molecule, (Z)-N,4-dihydroxybenzimidoyl cyanide, decorated with an –OH group and a cyanooxime moiety, it has been shown that in a competitive molecular recognition event, the former is the better hydrogen-bond donor. This structural behaviour is reflected by calculated electrostatic potential surfaces of the competing donors, which highlights that electrostatic charge can offer a reliable tool for predicting primary hydrogen-bond preferences.
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Hydrogen-bond donors, Phenols, Cyanooximes
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