Structure of inorganic compounds halogen bonds in derivatives of 2,5-diiod-1,4-dimethylbenzene

PII
S0023476124040062-1
DOI
10.31857/S0023476124040062
Publication type
Article
Status
Published
Authors
Volume/ Edition
Volume 69 / Issue number 4
Pages
612-619
Abstract
The synthesis of 1,4-di(bromomethyl)-2,5-diiodo-benzene (1), diacetate of 2,5-diiodo1,4-di(hydroxymethyl)benzene (2) and diiodide of 1,1’-[(2,5-diiodo-1,4-phenylene)bis(methylene)]dipyridinium (3) is described and their crystallographic data are given. All three crystal structures are characterized by the stacked packing of planar molecules and the presence of halogen bonds I–Br, I–O, and I–I, respectively. The number of halogen bonds is maximum in compound 1: two I–Br bonds for each halogen atom. Compounds 2 and 3 contain one halogen bond per halogen atom, but they are significantly shorter than in compound 1. All crystals were investigated by IR spectroscopy and synchronized thermal analysis. Compound 1, which has no ionic or hydrogen bonds, melts at a higher temperature than ionic compound 3 (218 and 200°C, respectively) due to the presence of a large number of intermolecular halogen bonds. Compound 2 melts at a lower temperature (151°C), which is characteristic of esters.
Keywords
Date of publication
26.07.2025
Number of purchasers
0
Views
47

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