Palladium(II) coordination chemistry of monoethyl 2-quinolylmethylphosphonate
摘要:
The synthesis and some spectroscopic properties of the new palladium(II) complexes with monoethyl 2-quinolylmethylphosphonate (2-mqmp) have been reported. It was shown that the molecular or the ionic complexes could be isolated by reaction of 2-mqmp with PdX42-(X = Cl, Br) depending on the acidity of the aqueous reaction solution. The square planar dihalide complexes trans-Pd(2-mqmp)(2)X-2 with monodentate N-bonded ligand through the quinoline nitrogen were obtained at pH similar to 3.5. Under acidic conditions at pH < 3 the ion-pair salt complexes [2-mqmp H+][Pd(2-mqmp)X-3(-)] containing the protonated quinoline ligand as cation and the quinoliniummethylphosphonatetrihalopalladate complex as anion were isolated. These ionic complexes by heating in methanol were decomposed: the chloro complex to the molecular dichloropalladium adduct Pd(2-mqmp)(2)Cl-2, while its bromo analogue gave a mixture of the dibromopalladium adduct Pd(2-mqmp)(2)Br-2 and the ion-pair hexabromodipalladium salt complex [2-mqmp H+](2)[Pd2Br62-]. The chelate complex Pd(2-mqmp-H)(2) . 2H(2)O was isolated at pH > 6. In this compound 2-mqmp acts as a bidentate ligand through the quinoline nitrogen and the phosphonic acid oxygen. The new complexes were identified and characterized on the basis of elemental and thermogravimetric analysis, magnetic and conductance measurements, as well as by infrared and positive/negative-ion FAB-mass spectroscopic studies. (C) 1998 Elsevier Science Ltd. All rights reserved.
JAGODIC V.; BOZIC B.; TUSEK-BOZIC L.; HERAK M. J., J. HETEROCYCL. CHEM., 1980, 17, NO 4, 685-688
作者:JAGODIC V.、 BOZIC B.、 TUSEK-BOZIC L.、 HERAK M. J.
DOI:——
日期:——
Palladium(II) coordination chemistry of monoethyl 2-quinolylmethylphosphonate
作者:Ljerka Tušek-Božić、Martina D'Alpaos
DOI:10.1016/s0277-5387(97)00408-7
日期:1998.1
The synthesis and some spectroscopic properties of the new palladium(II) complexes with monoethyl 2-quinolylmethylphosphonate (2-mqmp) have been reported. It was shown that the molecular or the ionic complexes could be isolated by reaction of 2-mqmp with PdX42-(X = Cl, Br) depending on the acidity of the aqueous reaction solution. The square planar dihalide complexes trans-Pd(2-mqmp)(2)X-2 with monodentate N-bonded ligand through the quinoline nitrogen were obtained at pH similar to 3.5. Under acidic conditions at pH < 3 the ion-pair salt complexes [2-mqmp H+][Pd(2-mqmp)X-3(-)] containing the protonated quinoline ligand as cation and the quinoliniummethylphosphonatetrihalopalladate complex as anion were isolated. These ionic complexes by heating in methanol were decomposed: the chloro complex to the molecular dichloropalladium adduct Pd(2-mqmp)(2)Cl-2, while its bromo analogue gave a mixture of the dibromopalladium adduct Pd(2-mqmp)(2)Br-2 and the ion-pair hexabromodipalladium salt complex [2-mqmp H+](2)[Pd2Br62-]. The chelate complex Pd(2-mqmp-H)(2) . 2H(2)O was isolated at pH > 6. In this compound 2-mqmp acts as a bidentate ligand through the quinoline nitrogen and the phosphonic acid oxygen. The new complexes were identified and characterized on the basis of elemental and thermogravimetric analysis, magnetic and conductance measurements, as well as by infrared and positive/negative-ion FAB-mass spectroscopic studies. (C) 1998 Elsevier Science Ltd. All rights reserved.
Jagodic, V.; Bozic, B.; Tusek-Bozic, Lj., Journal of Heterocyclic Chemistry, 1980, vol. 17, p. 685 - 688
作者:Jagodic, V.、Bozic, B.、Tusek-Bozic, Lj.、Herak, M. J.