Calorimetric investigation of the complexation of metal ions by pentadentate ligands having pyridyl and imidazolyl donor groups and the oxygenation of the cobaltous complexes
Calorimetric investigation of the complexation of metal ions by pentadentate ligands having pyridyl and imidazolyl donor groups and the oxygenation of the cobaltous complexes
复制标题
具有吡啶基和咪唑基供体基团的五齿配体与金属离子的络合以及钴络合物的氧化的量热研究
DOI：
10.1021/ic00134a051
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发表时间：
1982
影响因子：
4.6
通讯作者：
I. Murase
中科院分区：
文献类型：
--
作者：
J. Timmons;A. Martell;W. R. Harris;I. Murase
通过金属离子与含有吡啶基供体的配体反应形成的络合物的稳定常数往往高于基于吡啶基的弱供体能力所预测的稳定常数，23如果假设配体质子化常数反映了这种能力。这些配合物的稳定性增强通常归因于吡啶基x或 * 轨道与适当的金属d轨道之间的键合。如先前报道的，21”含吡啶基的配体1，9-双（2-吡啶基）-2，5，8-三氮杂壬烷（PYDIEN）、1，11-双（2-吡啶基）-2，6，10-三氮杂十一烷（PYDIEN）、1，11-双（2-吡啶基）-2，6，10-三氮杂十一烷（PYDIEN）、1，11-双（2-吡啶基）-2，6，10-三
The stability constants for complexes formed by the reaction of metal ions with ligands containing pyridyl donors tend to be higher than one would predict on the basis of the weak-donating ability of the pyridyl group, 23 if it is assumed that the ligand protonation constants reflect this ability. The en-hanced stabilities of these complexes are normally attributed to bonding between the pyridyl x or* orbitals and ap-propriate metal d orbitals. As reported previously, 21” the py-ridyl-containing ligands l, 9-bis (2-pyridyl)-2, 5, 8-triazanonane (PYDIEN), 1, 1 l-bis (2-pyridyl)-2, 6, 10-triazaundecane (PY-