Organometallic rhodium (I) complexes with 1-alkylaminopyrazole ligands

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Abstract

New bidentate NN′ and tridentate NN′N 1-alkylaminopyrazoles were synthesized and characterized by elemental analyses and spectroscopic methods. The reaction of [RhCl(cod)2] (cod=cycloocta-1,5-diene) with one equivalent of L 1-alkylaminopyrazoles afforded Rh2Cl2(L)(cod)2 complexes (L=NN′ and NN′N). These rhodium (I) compounds were studied by IR, 1H- and 13C-NMR and liquid mass (with electrospray and APCI interfaces) spectrometries. The 1H-NMR spectra and molar conductances of these complexes suggested the presence of 1:1 electrolyte species, [Rh(L)cod]+ [RhCl2(cod)]-, in solution. A combined electrospray and APCI liquid mass spectroscopy study confirmed the presence of both [Rh(L)cod]+ and [RhCl2(cod)]- species in solution but the existence of a neutral molecular form of complexes in solution could not be demonstrated. © 2001 Elsevier Science B.V.
Original languageEnglish
Pages (from-to)14-23
JournalJournal of Organometallic Chemistry
Volume619
Issue number1-2
DOIs
Publication statusPublished - 30 Jan 2001

Keywords

  • 1-Alkylaminopyrazoles
  • Electrospray mass spectra
  • Rhodium complexes
  • Rhodium-amine complexes

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