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.
|Journal||Journal of Organometallic Chemistry|
|Publication status||Published - 30 Jan 2001|
- Electrospray mass spectra
- Rhodium complexes
- Rhodium-amine complexes