Premium
Syntheses and crystal structures of lanthanide complexes of new 15‐membered macrocyclic ligands with three pendant acetato groups
Author(s) -
Yao YingMing,
Shen Qi,
Wong WingTak
Publication year - 2003
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20030210922
Subject(s) - chemistry , lanthanide , crystallography , crystal structure , molecule , solid state , metal , single crystal , trigonal prismatic molecular geometry , stereochemistry , ion , octahedron , organic chemistry
Abstract Two new 15‐membered functionalized macrocycles, dioxo‐polyazacycloalkanes with three pendant acetato groups, have been synthesized by the condensation reaction of DTP A 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 2 O)] 2 [Ln = Eu (1), Gd (2)] and [Ln(15‐DTPA‐1,2‐cy)(H 2 O)] 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.