Crystal structure of iodoform at 106 K and of the adduct CHI3 center dot 3(C9H7N). Iodoform as a building block of co-crystals

The structures of CHI3 and of its adduct with quinoline have been
analyzed using X-ray single crystal diffraction at low (106 K, CHI3) and
room temperature (adduct CHI3 center dot 3(C9H7N)). The disorder of the
molecule is removed at low temperature and the non centrosymmetric
structure in P6(3) space group allows a deep examination of the halogen
bondings in the crystal. The iodine atom clearly shows in the both
compounds its electrophilic and nucleophilic behavior. It is noteworthy
that when iodoform forms adducts involving the three iodine atoms with
Lewis bases, it gives raise to non centrosymmetric crystals, and it is a
good candidate for obtaining new materials. (c) 2012 Elsevier B.V. All
rights reserved.