Abstract
In this paper, we calculated a series of halogen-bonded complexes. The halogen bond donor is CF nH 3−nCl, and the halogen bond acceptors are NH 3, H 2O, H 2S, and Br −. Ten stable halogen-bonded complexes were obtained and the C–Cl bond length was contracted in all of these complexes. We carried out AIM and NBO analysis under the MP2/aug-cc-PVDZ optimized structures. The variation of the electron density at the bond critical point of C–Cl bond correlates well with Δ r(C–Cl). A balance among intra- and inter-hyperconjugation and rehybridization determined the contracted C–Cl bond.
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