Cation- and/or anion-directed reaction routes. Could the desolvation pattern of isostructural coordination compounds be related to their molecular structure

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• 作者：Berta Holl(1)
  Marko V. Rodi (1)
  Oskar Bera (2)
  Mirjana Jovii (2)
  Vukadin M. Leovac (1)
  Zoran D. Tomi (3)
  Katalin Mzos Szsyi (1)
  
• 关键词：CuII perchlorate ; Isostructural CoII and NiII pyrazole complexes ; Desolvation mechanism ; Jahn ; Teller effect
• 刊名：Structural Chemistry
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：24
• 期：6
• 页码：2193-2201
• 全文大小：
• 作者单位：Berta Holl(1)
  Marko V. Rodi (1)
  Oskar Bera (2)
  Mirjana Jovii (2)
  Vukadin M. Leovac (1)
  Zoran D. Tomi (3)
  Katalin Mzos Szsyi (1)
  
  1. Faculty of Sciences, University of Novi Sad, Trg D. Obradovia 3, 21000, Novi Sad, Serbia
  2. Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000, Novi Sad, Serbia
  3. Vina Institute of Nuclear Sciences, University of Belgrade, P.O.Box 522, 11001, Belgrade, Serbia
  
• ISSN：1572-9001

文摘

The crystal and molecular structure of [Cu(ampf)(ClO4)(MeOH)2]ClO4, (1), ampf=N,Nbis(4-acetyl-5-methylpyrazol-3-yl)formamidine, determined by X-ray crystallography is described and compared with the structurally related copper(II) complexes, formed under similar experimental conditions, using CuII salts with different anions. The complex formation is discussed in view of the structures of cobalt(II) and nickel(II) complexes with the same organic ligand and different anions, also formed under similar reaction conditions. Solvent molecules coordinated to the central atom play an important role in biologic systems. To get a better insight into the desolvation mechanism, in this study the desolvation pattern of 1 is presented. As in literature little attention is paid to the desolvation mechanism of solvate complexes, the desolvation mechanism of three, potentially biologically active isostructural pairs of octahedral NiII and CoII compounds with ampf and dmpc (3,5-dimethyl-1H-pyrazole-1-carboxamidine) ligands are evaluated and compared with the desolvation of 1. The results of the thermal data are discussed on the basis of structural features of the compounds. The minor differences in structures of the related compounds cannot be straightforwardly connected with the different solvent evaporation mechanism. To explain the differences found in desolvation pattern in isostructural CoII and NiII complexes the Jahn-Teller effect is proposed.