Noncovalent Interactions in Compounds Based on Perchlorinated Boron Cluster as Monitored by 35Cl NQR (Review)статья
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Дата последнего поиска статьи во внешних источниках: 3 июня 2020 г.
Аннотация:The article surveys the first 35Cl NQR results on detecting and characterizing noncovalent interactions in systems assembling [B10Cl10]2− clusters via halogen atoms. A number of compounds of decachlorocloso-decaborates with alkali metal or organic cations as well as with silver(I), copper(II) and iron(II) complexes were studied using 35Cl NQR and X-ray diffraction. The main interest of this survey is a capability of chlorine atoms to participate in noncovalent interactions with organic cations, ligand and solvent molecules without touching upon issues of synthesis. Whereas X-ray diffraction establishes the noncovalent interactions relying on the sum of vdW radii which serves as the basic and sometimes the only experimental criterion for identifying such interactions, the 35Cl NQR technique registers subtle perturbations in electron density distribution on the chlorine site caused by secondary interactions Cl···X. They adequately split the 35Cl NQR spectra thus selecting from the entire set of interatomic contacts those actually induced by noncovalent interactions.