Abstract
For inorganic benzenes C3N3X3 and B3O3X3 (X = H, F, CN), the positive electrostatic potentials (π-hole) were discovered above and below the inorganic benzene ring center. Then, the π-hole interactions between the inorganic benzenes and NCH have been designed and investigated by MP2/aug-cc-pVDZ calculations. In this paper, the termolecular complexes B3O3X3···NCH···NCH, C3N3X3···NCH···NCH (X = H, F, CN) were also designed to illustrate the enhancing effects of the H···N hydrogen bond on the π-hole interactions. The π-hole interaction energy was influenced by the strength of different electron-withdrawing substituents of inorganic benzenes, gradually increasing in the order of X = H, F, CN. What’s more, the π electron densities account for 71~88% of the total electron densities, indicating the strength of interaction energy is mainly determined by π-type electron densities.
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Acknowledgments
This project was supported by the National Natural Science Foundation of China (Contract Nos: 21371045, 21373075), the Natural Science Foundation of Hebei Province (Contract Nos: B2015205045). Thanks are also due to the Education Department of Hebei Province of China through innovative hundred talents support program (SLRC2017041).
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Chu, R., Zhang, X., Meng, L. et al. Inorganic benzenes as the noncovalent interaction donor: a study of the π-hole interactions. J Mol Model 23, 335 (2017). https://doi.org/10.1007/s00894-017-3513-7
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DOI: https://doi.org/10.1007/s00894-017-3513-7