Design and understanding of solid-state and crystalline materials
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CrystEngComm, 2008, 10, 1501 - 1515, DOI: 10.1039/b812026a
Lone pair–
interactions: a new supramolecular bond?Tiddo J. Mooibroek, Patrick Gamez and Jan Reedijk
Anion–
interactions have been receiving a great deal of attention from the scientific community for the past five years. This type of non-covalent bond is being recognized as a supramolecular interaction by chemists. Remarkably, the status for the lone pair(lp)- interaction, namely the bonding association between a neutral electron-rich molecule and an electron-poor ring, is hardly studied. The importance of lp– interactions was clearly evidenced in a number of biological systems more than ten years ago; amazingly, only a few examples of lp– interactions involving small synthetic molecules have been reported so far in the literature. Are these examples unique? Actually, a detailed analysis of the Cambridge Structure Database shows that such interactions are not unusual in organic compounds, but apparently have been overlooked in the past.
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