This study reports the formation of three co-crystals based on different halogen-bond donors and acceptors, where the different halogen bond formations between 1,4-diiodoperchlorobenzene and 1,4-diiodoperfluorobenzene lead to structural diversity in these co-crystals.
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 ClMIDLINE HORIZONTAL ELLIPSISO halogen bonds while 1,4-diiodoperfluorobenzene forms C-HMIDLINE HORIZONTAL ELLIPSISF interactions leads to the structural diversity of these co-crystals.
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