Organoiodine complexes: Structural and functional variety

Abstract

The present review summarizes the results of structural studies of organoiodine complexes. Particular emphasis is given to the role of intermolecular interactions such as halogenhalogen (I...I), hydrophobic, π-π stacking, and hydrogen bonds (C-H...I) in the formation of supramolecular iodine containing architectures. The molecular formula, size, shape, and stability of the polyhalide ion and the way of its coordination by an outer sphere cation or an organic macromolecule depend on the nature and symmetry of the cationic environment, the ability of a solvating solvent to form complexes with iodine, and the conditions of the synthesis. Efforts have been made to highlight a structural and functional variety of iodine containing complexes and estimate the prospects of using them as organic conductors, magnetic materials, liquid electrolytes, and biologically active compounds.

Interplay between non-covalent interactions in complexes and crystals with halogen bonds

“…Information on almost all known fields of application of iodine-containing compounds and on experimental methods of assessment of their physicochemical properties is also available. 43,44 In this review, we will analyze factors responsible for strengthening of halogen bonds in the complexes in which these bonds co-exist with other non-covalent interactions. Also, there is a need to systematize the available information on the present-day descriptors of halogen bonds and to establish which modern methods and approaches give the most stable and clear estimates of the strength of halogen bonds in the presence of other non-covalent interactions.…”

Remote Substituents as Potential Control Elements for the Solid-State Structures of Hypervalent Iodine(III) Compounds

“…Though intentionally designed intramolecular I···E interactions are prominent in HVI chemistry, studies of intentionally designed intermolecular I···E interactions using remote substituents have been a limited area of research. By contrast, crystal engineering using substituted organoiodine­(I) compounds has been well developed over recent years. ,,, Interestingly, these interactions in the solid state can even lead to different photophysical properties, including new types of organic phosphorescent materials. − …”

“…By contrast, crystal engineering using substituted organoiodine-(I) compounds has been well developed over recent years. 26,29,52,53 Interestingly, these interactions in the solid state can even lead to different photophysical properties, including new types of organic phosphorescent materials. 54−56 This study reports on a systematic investigation of the impact of remote substituents (Z) on halogen bonding involving organoiodine(III) compounds in the solid state.…”

Synthesis and structure of interaction products of quinoline-2(1H)-thione with molecular iodine

“…Therefore iodine molecules usually tend to unite into anionic polyiodine iodide chains when a counterion is planar and can form a stacked structure with channels suited to the polyiodide chain in size and geometry [18].…”