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Iodide complexes of Cd(II) with 2-halogen-substituted pyridines: structures and features of halogen bond in solid

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1. Title Title of document Iodide complexes of Cd(II) with 2-halogen-substituted pyridines: structures and features of halogen bond in solid
2. Creator Author's name, affiliation, country S. A. Adonin; Nikolaev Institute of Inorganic Chemistry SB RAS; Favorsky Irkutsk Institute of Chemistry SB RAS; Russian Federation
2. Creator Author's name, affiliation, country A. S. Novikov; St. Petersburg State University; Russian Federation
3. Subject Discipline(s)
3. Subject Keyword(s) cadmium complexes; N-donor ligands; halogen bond; crystal structure; quantum chemical calculations
4. Description Abstract

Reactions of CdI2 with 2-chloro (2-ClPy), 2-bromo (2-BrPy), 2-iodo (2-IPy) and 2-bromo-5-methylpyridine (2-Br-5-MePy) led to heteroleptic neutral complexes {[LCdI2]}n (L = 2-ClPy (1), 2-BrPy (2)) and [L2CdI2] (2-IPy (3), 2-Br-5-MePy (4)); their structures were determined by single crystal X-ray diffractometry. In the structures of 3 and 4, there were found halogen bonds which were examined by DFT calculations.

5. Publisher Organizing agency, location The Russian Academy of Sciences
6. Contributor Sponsor(s) Government of the Russian Federation
7. Date (DD-MM-YYYY) 15.07.2024
8. Type Status & genre Peer-reviewed Article
8. Type Type Research Article
9. Format File format
10. Identifier Uniform Resource Identifier https://rjraap.com/0044-457X/article/view/666452
10. Identifier Digital Object Identifier (DOI) 10.31857/S0044457X24070104
10. Identifier eLIBRARY Document Number (EDN) XNKQZL
11. Source Title; vol., no. (year) Žurnal neorganičeskoj himii; Vol 69, No 7 (2024)
12. Language English=en ru
13. Relation Supp. Files Fig. 1. Fragment of the polymer chain {[(2-ClPy)CdI2]}n in structure 1. Here and in Figs. 2, 3, Cd is shown in black, C and H in gray, I in violet, N in blue, and Cl in light green. (212KB)
Fig. 2. Structure of compound 3. (148KB)
Fig. 3. Halogen bonds in structure 3. (180KB)
Fig. 4. Contour line diagram of the Laplacean electron density ∇2ρ(r) distribution, bond paths and zero flux surfaces (a), electron localization function (ELF, b) and reduced electron density gradient (RDG, c) distribution images corresponding to noncovalent I---I interactions in compound 3. Critical bonding points (3, -1) are shown in blue, critical points of nuclei (3, -3) in light brown, and critical cycle points (3, +1) in orange. Length units are Å, the ELF and RDG value scale is presented in atomic units. (660KB)
Fig. 5. Contour line diagram of the ∇2ρ(r) Laplacian electron density distribution, bond paths and zero flux surfaces (a), electron localization function (ELF, b) and reduced electron density gradient (RDG, c) distribution images corresponding to noncovalent I---I interactions in compound 4. Critical bonding points (3, -1) are shown in blue, critical points of nuclei (3, -3) in light brown, and critical cycle points (3, +1) in orange. Length units are Å, the ELF and RDG value scale is presented in atomic units. (605KB)
Fig. 6. Visualization of halogen bonds I---I and Br---I in crystals 3 (a) and 4 (b) within the framework of the formalism of analysis of noncovalent interactions in model supramolecular associations (NCI analysis). (378KB)
14. Coverage Geo-spatial location, chronological period, research sample (gender, age, etc.)
15. Rights Copyright and permissions Copyright (c) 2024 Russian Academy of Sciences