Cooperative non-covalent interactions and synthetic feed as driving forces to structural diversity within organic co-crystals containing isosteric perhalobenzenes

Abstract

The formation of three co-crystals based upon a pair of isosteric halogen-bond donors, namely 1,4-diiodoperchlorobenzene and 1,4-diiodoperfluorobenzene, along with the acceptor trans-1-(4-methylbenzoate)-2-(4-pyridyl)ethylene is reported. Along with the varied stoichiometric ratios of the components, the ability of 1,4-diiodoperchlorobenzene to engage in cooperative Cl⋯O halogen bonds while 1,4-diiodoperfluorobenzene forms C–H⋯F interactions leads to the structural diversity of these co-crystals.