Spectroscopic and computational studies on a new Pd(II)-bis(pyrazol-1-yl)methane aqua-complex
摘要:
By reacting a stoichiometric amount of BPM or Me2BPM (BPM = bis(pyrazol-1-yl)methane, Me2BPM = bis(3,5-dimethylpyrazol-1-yl)methane) with Pd(OAc)(2) (OAc = acetate) in CH2Cl2, the new neutral complexes [Pd(OAc)(2)(BPM)] (1) and (Pd(OAc)(2)(Me2BPM)1(1(Me)) were isolated and characterized by NMR and IR spectroscopy. Acidolysis of one Pd-OAc bond of compound 1 by using aqueous perchloric acid in methanol led to the formation of the stable cationic aqua-complex [Pd(OAc)(H2O)(BPM)](ClO4) (2-ClO4). The [Pd(OAc)(H2O)(BPM)](+) cation was obtained also by reacting 1 with trifluoromethanesulfonic acid. NMR studies on inter- and intra-molecular hydrogen bonding of the aqua-ligand have been carried out and the data obtained have been interpreted on the basis of the results of DFT calculations. (C) 2010 Elsevier B.V. All rights reserved.
Spectroscopic and computational studies on a new Pd(II)-bis(pyrazol-1-yl)methane aqua-complex
摘要:
By reacting a stoichiometric amount of BPM or Me2BPM (BPM = bis(pyrazol-1-yl)methane, Me2BPM = bis(3,5-dimethylpyrazol-1-yl)methane) with Pd(OAc)(2) (OAc = acetate) in CH2Cl2, the new neutral complexes [Pd(OAc)(2)(BPM)] (1) and (Pd(OAc)(2)(Me2BPM)1(1(Me)) were isolated and characterized by NMR and IR spectroscopy. Acidolysis of one Pd-OAc bond of compound 1 by using aqueous perchloric acid in methanol led to the formation of the stable cationic aqua-complex [Pd(OAc)(H2O)(BPM)](ClO4) (2-ClO4). The [Pd(OAc)(H2O)(BPM)](+) cation was obtained also by reacting 1 with trifluoromethanesulfonic acid. NMR studies on inter- and intra-molecular hydrogen bonding of the aqua-ligand have been carried out and the data obtained have been interpreted on the basis of the results of DFT calculations. (C) 2010 Elsevier B.V. All rights reserved.