Designer Host–Guest Complexes: Co-Crystals of 1,3-Adamantanedicarboxylic Acid and 4,7-Phenanthroline with Some Guests

Multicomponent host–guest complexes consisting of 1,3-adamantanedicarboxylic acid (<b>1</b>) and 4,7-phenanthroline (phen) as the host moiety with different guests are prepared through co-crystallization. Detailed structural analysis of the obtained complexes, characterized by the single-crystal X-ray diffraction method, has been reported. In all the complexes, molecules of <b>1</b> and phen constitute a unique four-membered cyclic host network into a two-dimensional arrangement. Further stacking of such networks resulted in a channel structure directed by the guest species through O–H···O hydrogen bonds