Synthesis, X-ray crystal structure and NMR characterisation of mononuclear Pd(II) and Pt(II) complexes of didentate ligands with NN′-donor set

Josefina Pons, Gemma Aragay, Jordi García-Antón, Teresa Calvet, Mercè Font-Bardia, Josep Ros

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Abstract

Two new 3,5-dimethylpyrazolic derived ligands that are N1-substituted by diamine chains, 1-[2-(diethylamino)ethyl]-3,5-dimethylpyrazole (L1) and 1-[2-(dioctylamino)ethyl]-3,5-dimethylpyrazole (L2) were synthesised. Reaction of the ligands, L1 and L2, with [MCl2(CH3CN)2] yielded [MCl2(L)] (M = Pd(II), Pt(II)) complexes. These complexes were characterised by elemental analyses, conductivity measurements, IR, 1H, 13C{1H} and 195Pt{1H} NMR spectroscopies. The crystal structure of [PdCl2(L1)] was determined by single-crystal X-ray diffraction methods. The structure consists of mononuclear units. The Pd(II) atom is coordinated by a pyrazolic nitrogen, an amine nitrogen and two chlorine atoms in a cis disposition. In this structure, C-H⋯Cl, C-H⋯H-C and C-H⋯C-H intermolecular interactions have been identified. © 2009 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)911-917
JournalInorganica Chimica Acta
Volume363
Issue number5
DOIs
Publication statusPublished - 22 Mar 2010

Keywords

  • Crystal structures
  • N-Alkylaminopyrazole ligands
  • Palladium(II) complexes
  • Platinum(II) complexes
  • Pyrazole ligands

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