Synthesis and characterisation of new N1-alkyl-3,5-dipyridylpyrazole derived ligands. Study of their reactivity with Pd(II) and Pt(II)

Vanessa Montoya, Josefina Pons, Xavier Solans, Mercè Font-Bardia, Josep Ros

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24 Citations (Scopus)

Abstract

Two new pyrazole-derived ligands, 1-ethyl-3,5-bis(2-pyridyl)pyrazole (L1) and 1-octyl-3,5-bis(2-pyridyl)pyrazole (L2), both containing alkyl groups at position 1 were prepared by reaction between 3,5-bis(2-pyridyl) pyrazole and the appropriate bromoalkane in toluene using sodium ethoxide as base. The reaction between L1, L2 and [MCl2(CH3CN)2] (M = Pd(II), Pt(II)) resulted in the formation complexes of formula [MCl2(L)] (M = Pd(II), L = L 1 (1); M = Pd(II), L = L2 (2); M = Pt(II), L = L 1 (3); M = Pt(II), L = L2 (4)). These complexes were characterised by elemental analyses, conductivity measurements, infrared, 1H, 13C{1H} NMR and HMQC spectroscopies. The X-ray structure of the complex [PtCl2(L2)] (4) was determined. In this complex, Npyridine and Npyrazole donor atoms coordinate the ligand to the metal, which complete its coordination with two chloro ligands in a cis disposition. © 2005 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)2763-2769
JournalInorg. Chim. Acta
Volume358
Issue number9
DOIs
Publication statusPublished - 1 Jun 2005

Keywords

  • Crystal structure.
  • N1-alkylpyridyl pyrazole ligands
  • Palladium complexes
  • Platinum complexes

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