Pyrazolic palladium compounds containing alcohol functionality: Hindered rotation around Pd-N bond

Anna Boixassa, Josefina Pons, Albert Virgili, Xavier Solans, Mercè Font-Bardia, Josep Ros

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41 Citations (Scopus)

Abstract

Reactions of the ligands 1-hydroxymethyl-3,5-dimethylpyrazole (HL1), 1-(2-hydroxyethyl)-3,5-dimethylpyrazole (HL2) and 1-(3-hydroxypropyl)-3,5-dimethylpyrazole (HL3) with [PdCl2(CH3CN)2] lead to trans-[PdCl2(HL)2] complexes. The ligands are coordinated to the Pd(II) by a N atom of the pyrazolic ring in a trans disposition. Two chlorides complete the environment of the metallic atom. These Pd(II) complexes were characterised by elemental analyses, conductivity measurements and IR, 1H and 13C NMR spectroscopies and X-ray diffraction. The NMR study of the complexes is consistent with a very slow rotation of ligands around the Pd-N bond, so that two conformational isomers can be observed in solution. The crystal structures of [PdCl2(HL)2] (HL=HL1, HL2) complexes are described. These complexes react with AgNO3 to give [Pd(NO3)(HL)2]NO3 compounds. © 2002 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)49-55
JournalInorganica Chimica Acta
Volume340
DOIs
Publication statusPublished - 25 Nov 2002

Keywords

  • Crystal structures
  • Palladium complexes
  • Pyrazole complexes

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