Geometric and spectral characteristic of the tetrahalocuprate(II) complexes (HL)2CuX4 (X = Cl, Br). Crystal and molecular structures of bis(2-methylimidazolium) tetrabromocuprate(II)

The crystal and molecular structures of bis(2-methylimidazolium) tetrabromocuprate(II) are determined. The linear dependences of the degree of distortion of the CuBr 4 2- coordination polyhedron on the protonation constant of the organic cation are revealed for the structures with θ < 140°. The dependence of the hydrogen bond parameters (distances HBr and NBr, angle NHBr) on the degree of distortion of CuBr 4 2- is shown. The degree of distortion of CuX 4 2- (X = Cl, Br) is determined by the type of the organic cation and is almost the same for the CuBr 4 2- and CuCl 4 2- polyhedra. The empirical equations relating the degree of distortion of CuX 4 2- (X = Cl, Br) and the position of the Cu X ligand-to-metal charge-transfer band (νLMCT) are obtained. © 2009 Pleiades Publishing, Ltd.

Editors
-
Publisher
-
Number of issue
7
Language
English
Pages
496-503
Status
Published
Department
-
Number
-
Volume
35
Year
2009
Organizations
  • 1 Peoples Friendship University, ul. Miklukho-Maklaya 6, Moscow, Russian Federation
  • 2 Karpov Research Institute of Physical Chemistry, ul. Vorontsovo pole 10, Moscow 103064, Russian Federation
Keywords
2-methylimidazolium; Charge-transfer bands; Coordination polyhedra; Crystal and molecular structure; Degree of distortion; Empirical equations; Linear dependence; Organic cations; Protonation constants; Spectral characteristics; Tetrabromocuprate; Copper compounds; Hydrogen; Hydrogen bonds; Molecular structure; Positive ions; Coordination reactions
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/2946/