Charge-Assisted Halogen Bonds in Halogen-Substituted Pyridinium Salts: Experimental Electron Density
Charge-Assisted Halogen Bonds in Halogen-Substituted Pyridinium Salts: Experimental Electron Density
复制标题
卤素取代的吡啶鎓盐中的电荷辅助卤素键:实验电子密度
DOI:
10.1021/acs.cgd.6b01562
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发表时间:
2017
影响因子:
3.8
通讯作者:
U. Englert
中科院分区:
文献类型:
--
作者:
A. Wang;R. Wang;I. Kalf;A. Dreier;C. W. Lehmann;U. Englert
Favorable electrostatic interactions dominate the packing of three halogen-substituted pyridinium salts with chloride or tetrachloridometallate counteranions. The electron density in these solids was determined based on high resolution X-ray diffraction experiments. Residues carrying opposite charges subtend short interhalogen contacts X···X in which the anionic chlorides act as electron donors and the cationic halogen substituents of the pyridinium cations act as acceptors. The X···X interactions coexist and in part compete with classical N–H···Cl hydrogen bonds. Properties derived from the experimental charge density such as the position of the bond critical point, electron density, Laplacian and energy densities help to establish the relevance of the competing interactions. Multipole-derived charge densities allow classification of short contacts more reliably than exclusively geometry-based analyses and simple promolecule densities.
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DOI:
10.1021/acs.jpcb.5b03533
发表时间:
2015
期刊:
The journal of physical chemistry. B
影响因子:
--
作者:
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通讯作者:
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影响因子:
3.1
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影响因子:
3
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2009
期刊:
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影响因子:
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发表时间:
2015
期刊:
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影响因子:
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通讯作者:
U. Englert