Iodine–Iodine Bonding makes Tetra(diiodine)chloride, [Cl(I₂)₄]⁻, Planar

Abstract

All square: The polyinterhalide [Cl(I2)4]− is square-planar in the crystal structure of [(H5O2)(I2b15c5)2][Cl(I2)4] (I2b15c5=diiodobenzo-15-crown-5), although it would be tetrahedral in the gas phase. Along with other effects, such as electrostatic attractions between the cationic and planar anionic layers, iodine–iodine bonding with σ-hole interactions plays a considerable role is stabilizing the square-planar configuration. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.