Table 3. Intramolecular Halogen Bond Distances and the Observed Primary Synthon in the 2c4n Salts.

molecular salts of 2c4n	intramolecular Cl···O halogen bond distance (Å)	presence of halogen bonds	observed primary synthon
2c4n.a	3.210	×	single point
2c4n.b	3.070 & 3.003	×	single point
2c4n.c	3.200	×	single point
2c4n.d	2.992	√	two point
2c4n.e	3.038	√	two point
2c4n.f	3.161	×	two point
2c4n.g	3.055	√	two point
2c4n.h	3.141	√	single point
benzotriazole	2.917	√	single point
2-amino-3-bromopyridine	×	√	two point
2-amino-5-bromopyridine	×	√	two point
2-amino-5-chloropyridine	×	√	two point
2-amino-5-nitropyridine	3.023	√	single point
2-bromopyridine	×	√	single point
bipyridine82	3.011	√	single point
2-chloro-3-hydroxypyridine	×	√	single point
4-aminopyridine	2.889	×	single point
lutidine83	2.898	√	single point
morpholine84	×	×	single point
nicotinamide85	2.750	√	single point
quinoline	3.031	√	single point
pyrazine	3.004	×	single point
2,6-dimethylpyridine	×	×	single point
2-bromo-3-aminopyridine	×	×	single point
3-aminophenol86	×	×	single point
3-cyanopyridine	3.063	×	single point
2-chloro-3-aminopyridine	×	×	single point
benzimidazole87	×	×	single point
imidazole	3.250	×	single point
isoniazid88	3.079	×	single point
isopropylideneisonicotinohydrazide	2.910, 2.892	√	single point
4-benzoylpyridine	×	×	single point