“…Such interactions, termed as charge‐assisted halogen bonds, are indeed of vital importance in crystal engineering. For example, halogen···halide (CY···X − , X and YCl, Br or I) synthons do play a crucial role in determining the crystal structure of halogenated pyridinium salts 31–35 and other crystal structures, such as diphenyl dichlorophosphonium trichloride‐chlorine solvate mixture 36, tetrahalometalate (II) ions 37–41, and 1,2‐dibromohexafluoropropane 42. More recently, Willett and coworkers described the role of C—Br···X − synthons in the crystal structures of Cu( n bp) 2 X 2 ( n bp = n ‐bromopyridine; n = 2 and 3) 43.…”