Journal of Structural Chemistry

, Volume 58, Issue 3, pp 508–518

On the structure of copper(II) coordination compounds with L-histidine

  • V. T. Panyushkin
  • I. N. Shcherbakov
  • V. A. Volynkin
  • S. N. Bolotin
  • N. N. Bukov
  • T. V. Shvydko
  • L. Kh. Dzhabrailova
  • M. Kh. Shamsutdinova
Article
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Abstract

Quantum chemical calculations are performed for the spatial and electron structure of complex compounds of L-histidine and its ionized forms with copper(II) for a variety of compositions within the density functional theory (DFT) using the B3LYP functional and 6-311G(d) basis. The solvent (water) is considered within the PCM approximation. EPR spectroscopy is used to study the equilibrium in the copper(II)–L-histidine system in an aqueous solution at рН 2–11. A comparison between the theoretical calculations and the EPR spectra suggests the following geometry for the coordination environment of the copper(II) ion in the complex compounds: CuHLL–square-planar coordination; CuL2, CuHLL′, and CuLL′–distorted square pyramid; and CuL2′–octahedral environment.

Keywords

L-histidine EPR DFT 

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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • V. T. Panyushkin
    • 1
  • I. N. Shcherbakov
    • 2
  • V. A. Volynkin
    • 1
  • S. N. Bolotin
    • 1
  • N. N. Bukov
    • 1
  • T. V. Shvydko
    • 2
  • L. Kh. Dzhabrailova
    • 3
  • M. Kh. Shamsutdinova
    • 3
  1. 1.Kuban State UniversityKrasnodarRussia
  2. 2.South Federal UniversityRostov-on-DonRussia
  3. 3.Chechen State UniversityGroznyRussia

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