O-17 NUCLEAR MAGNETIC-RESONANCE KINETIC-STUDY OF WATER EXCHANGE ON THE LANTHANIDE(III) AQUA IONS
O-17 NUCLEAR MAGNETIC-RESONANCE KINETIC-STUDY OF WATER EXCHANGE ON THE LANTHANIDE(III) AQUA IONS
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DOI：
10.1021/ic00284a028
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发表时间：
1988-06-01
影响因子：
4.6
通讯作者：
MERBACH, AE
中科院分区：
文献类型：
--
作者：
COSSY, C;HELM, L;MERBACH, AE
介绍三正镧系元素构成化学相似的金属离子的最长系列。由于它们的4f轨道被填充的5s和5p轨道的电子屏蔽，配体场效应或配体ir轨道背键非常弱。因此，镧系元素配合物的稳定性和动力学行为主要受空间和静电因素控制。镧系配合物的高配位数和晶体场稳定能的缺乏是其不稳定性的主要原因。
Introduction The tripositive lanthanides constitute the longest series of chemically similar metal ions. As their 4f orbitals are shielded by the electrons of the filled 5s and 5p orbitals, ligandfield effects or ligand ir-orbital back-bonding are very weak. The stability and kinetic behavior of the lanthanide complexes are thus mainly governed by steric and electrostatic factors. The high coordination number and the absence of crystal field stabilization energy are responsible for the considerable lability of the lanthanide com-plexes.