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

doi:10.1016/S0020-1693(02)01052-6

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

Department of Chemistry

Research output: Contribution to journal › Article › Research › peer-review

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 language	English
Pages (from-to)	49-55
Journal	Inorganica Chimica Acta
Volume	340
DOIs	https://doi.org/10.1016/S0020-1693(02)01052-6
Publication status	Published - 25 Nov 2002

Keywords

Crystal structures
Palladium complexes
Pyrazole complexes

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title = "Pyrazolic palladium compounds containing alcohol functionality: Hindered rotation around Pd-N bond",

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. {\textcopyright} 2002 Elsevier Science B.V. All rights reserved.",

keywords = "Crystal structures, Palladium complexes, Pyrazole complexes",

author = "Anna Boixassa and Josefina Pons and Albert Virgili and Xavier Solans and Merc{\`e} Font-Bardia and Josep Ros",

year = "2002",

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T1 - Pyrazolic palladium compounds containing alcohol functionality: Hindered rotation around Pd-N bond

AU - Boixassa, Anna

AU - Pons, Josefina

AU - Virgili, Albert

AU - Solans, Xavier

AU - Font-Bardia, Mercè

AU - Ros, Josep

PY - 2002/11/25

Y1 - 2002/11/25

N2 - 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.

AB - 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.

KW - Crystal structures

KW - Palladium complexes

KW - Pyrazole complexes

U2 - 10.1016/S0020-1693(02)01052-6

DO - 10.1016/S0020-1693(02)01052-6

M3 - Article

VL - 340

SP - 49

EP - 55

ER -