Synthesis of metal complexes with a novel ethyldioxolane pendant-arm hexaazamacrocyclic ligand
摘要:
The coordination capability of a pendant-arm azamacrocyclic ligand L with four ethyldioxolane pendant groups towards transition, post-transition and lanthanide metal ions was achieved. In all cases, complexes with a 2:1 metal:ligand molar ratio were obtained. The complexes were characterized by elemental analysis, MS-FAB, IR, conductivity measurements, H-1 and C-13 NMR spectroscopy. Crystal structures of [CoL][CoBr0.5(NO3)(3.5)] and [(H2O)H2L][Nd(NO3)(4)(H2O)(3)]NO3 center dot 3.5H(2)O have been determined. The [CoL](2+) cation contains the Co(II) ion endomacrocyclicly coordinated in a distorted octahedral geometry with a N-G core. The Nd(III) complex presents a mononuclear exomacrocyclic structure with an 11 coordination environment. pi,pi-Stacking interactions have been observed between the pyridine rings of the protonated ligand [(H2O)H2L](2+), and the [Nd(NO3)(4)(H2O)(3)](2-) anion. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis of metal complexes with a novel ethyldioxolane pendant-arm hexaazamacrocyclic ligand
摘要:
The coordination capability of a pendant-arm azamacrocyclic ligand L with four ethyldioxolane pendant groups towards transition, post-transition and lanthanide metal ions was achieved. In all cases, complexes with a 2:1 metal:ligand molar ratio were obtained. The complexes were characterized by elemental analysis, MS-FAB, IR, conductivity measurements, H-1 and C-13 NMR spectroscopy. Crystal structures of [CoL][CoBr0.5(NO3)(3.5)] and [(H2O)H2L][Nd(NO3)(4)(H2O)(3)]NO3 center dot 3.5H(2)O have been determined. The [CoL](2+) cation contains the Co(II) ion endomacrocyclicly coordinated in a distorted octahedral geometry with a N-G core. The Nd(III) complex presents a mononuclear exomacrocyclic structure with an 11 coordination environment. pi,pi-Stacking interactions have been observed between the pyridine rings of the protonated ligand [(H2O)H2L](2+), and the [Nd(NO3)(4)(H2O)(3)](2-) anion. (C) 2009 Elsevier Ltd. All rights reserved.
The coordination capability of a pendant-arm azamacrocyclic ligand L with four ethyldioxolane pendant groups towards transition, post-transition and lanthanide metal ions was achieved. In all cases, complexes with a 2:1 metal:ligand molar ratio were obtained. The complexes were characterized by elemental analysis, MS-FAB, IR, conductivity measurements, H-1 and C-13 NMR spectroscopy. Crystal structures of [CoL][CoBr0.5(NO3)(3.5)] and [(H2O)H2L][Nd(NO3)(4)(H2O)(3)]NO3 center dot 3.5H(2)O have been determined. The [CoL](2+) cation contains the Co(II) ion endomacrocyclicly coordinated in a distorted octahedral geometry with a N-G core. The Nd(III) complex presents a mononuclear exomacrocyclic structure with an 11 coordination environment. pi,pi-Stacking interactions have been observed between the pyridine rings of the protonated ligand [(H2O)H2L](2+), and the [Nd(NO3)(4)(H2O)(3)](2-) anion. (C) 2009 Elsevier Ltd. All rights reserved.