Halogen-bonded zigzag mol­ecular network based upon 1,2-di­iodo­perchloro­benzene and the photoproduct rctt-1,3-bis­(pyridin-4-yl)-2,4-di­phenyl­cyclo­butane

The formation and crystal structure of a zigzag mol­ecular network held together by I⋯N halogen bonds is reported. In particular, the halogen-bond donor is 1,2-di­iodo­perchloro­benzene (1,2-C(6)I(2)Cl(4) ) while the acceptor is a head-to-tail photoproduct, namely rctt-1,3-bis­(pyridin-4-yl)-2,4-di­phenyl­cyclo­butane ( ht -PP). In this co-crystal (1,2-C(6)I(2)Cl(4) )·( ht-PP), the donor acts as a bent two-connected node while the acceptor behaves as a linear linker to form the extended solid. Neighbouring chains pack in a tongue-and-groove-like pattern that engage in various Cl⋯π inter­actions to both the phenyl and pyridyl rings resulting in a supra­molecular two-dimensional sheet.