摘要
Two new 15-membered functionalized macrocycles, dioxo^polyazacycloalkanes with three pendant acetato groups, have been synthesized by the condensation reaction of DTPA dianhydride (DTPA=diethylenetriaminepentaacetic acid) with 1,2-diaminopropane, (15-DTPA-1,2-pn), or 1,2-diaminocyclohexane, (15-DTPA-1,2-cy). Their lanthanide complexes [Ln(15-DTPA-1,2-pn)(H 2O)] 2 [Ln=Eu (1), Gd (2)] and [Ln(15-DTPA-1,2-cy)(H 2O)] 2 [Ln=Eu (3), Gd (4)] were also prepared. Single crystal X-ray diffraction analyses of complexes 2 and 4 show that they have dimeric structures in solid state; each metal ion is nine-coordinated in a distorted tricapped-trigonal prism. In complex 4, the coexistence of two diastereoisomeric molecules in the crystal lattice was observed.
Two new 15-membered functionalized macrocycles, dioxo^polyazacycloalkanes with three pendant acetato groups, have been synthesized by the condensation reaction of DTPA dianhydride (DTPA=diethylenetriaminepentaacetic acid) with 1,2-diaminopropane, (15-DTPA-1,2-pn), or 1,2-diaminocyclohexane, (15-DTPA-1,2-cy). Their lanthanide complexes [Ln(15-DTPA-1,2-pn)(H 2O)] 2 [Ln=Eu (1), Gd (2)] and [Ln(15-DTPA-1,2-cy)(H 2O)] 2 [Ln=Eu (3), Gd (4)] were also prepared. Single crystal X-ray diffraction analyses of complexes 2 and 4 show that they have dimeric structures in solid state; each metal ion is nine-coordinated in a distorted tricapped-trigonal prism. In complex 4, the coexistence of two diastereoisomeric molecules in the crystal lattice was observed.
基金
theNationalNaturalScienceFoundationofChina (No .2 0 0 72 0 2 7)
