Craig Weinberger, Rachel Hines, Matthias Zeller and Sergiy V. Rosokha
Chem. Commun., 2018,54, 8060-8063
DOI:
10.1039/C8CC04629H,
Communication
A gradual change of Br⋯N bond lengths and strengths from the values typical for intermolecular associates to that characteristic of a covalent bond was observed in a series of halogen-bonded complexes. This continuum reveals a fundamental relationship between the limiting types of bonding and implies the onset of covalency in the intermolecular interactions.