Solid state and solution structures of the lanthanide complexes with cryptand (2.2.1): Crystallographic and NMR studies of a dimeric praseodymium (2.2.1) cryptate containing two μ-hydroxo bridges
Solid state and solution structures of the lanthanide complexes with cryptand (2.2.1): Crystallographic and NMR studies of a dimeric praseodymium (2.2.1) cryptate containing two μ-hydroxo bridges
复制标题
镧系元素与穴状配体 (2.2.1) 配合物的固态和溶液结构：含有两个 μ-羟基桥的二聚镨 (2.2.1) 穴状化合物的晶体学和核磁共振研究
DOI：
10.1007/978-94-009-3987-5_66
复制
发表时间：
1987
期刊：
影响因子：
--
通讯作者：
J. Desreux
中科院分区：
文献类型：
--
作者：
J. Rebizant;M. Spirlet;P. Barthelemy;J. Desreux
A dimeric lanthanide cryptate was obtained by the addition of an excess of cryptand (2.2.1) to a slightly hydrated solution of the monomeric praseodymium (2.2.1) perchlorate complex in acetonitrile. This new lanthanide compound is centrosymmetric and displays the space groupP21/n. The encryptated metal ions are nine-coordinated, they are bonded to all the heteroatoms of a (2.2.1) ligand and they are linked to each other by two μ-hydroxo bridges. The hydroxyl groups are relegating the cryptands to both end of the dimer and the praseodymium ions are less effectively accomodated in the macrocylic internal cavities than in the case of the monomeric Pr(2.2.1) complex. The formation of both the monomeric and the dimeric lanthanide complexes is readily observed by proton NMR.
