Synthesis of Chelating Agents. X. Chelating Behavior of 1,2-Diamines with Specific Configurations: cis- and Diequatorial trans-Diamino-trans-decalins, cis- and trans-Diaminotetralins and 3,3-Dimethyl-1,2-diaminobutane
Synthesis of Chelating Agents. X. Chelating Behavior of 1,2-Diamines with Specific Configurations: cis- and Diequatorial trans-Diamino-trans-decalins, cis- and trans-Diaminotetralins and 3,3-Dimethyl-1,2-diaminobutane
复制标题
螯合剂的合成。
DOI：
10.1246/bcsj.47.3033
复制
发表时间：
1974
影响因子：
4
通讯作者：
K. Ueno
中科院分区：
文献类型：
--
作者：
T. Yano;H. Kobayashi;K. Ueno
在 25 °C 下测定外消旋顺式和双赤道反式 2,3-二氨基-反式十氢化萘、顺式和反式-2,3-二氨基四氢化萘以及 3,3-二甲基-1,2-二氨基丁烷 (BEDA) 的金属螯合物的稳定性常数，其中 Cu(II)、Ni(II) 和 Zn(II) 是金属离子。脂环族反式二胺提供比顺式异构体更稳定的1:1络合物，与金属离子无关。 BEDA 金属螯合物的稳定性与反式二胺相当。反式和顺式二胺络合物的稳定性差异按照铜离子、锌离子和镍离子的顺序增加。形成1:2络合物后，Ni离子的作用力变得更大，但实际上与其他物质没有观察到差异。根据二胺的立体化学和二价金属离子的配位结构给出了解释。
Stability constants were determined at 25 °C for the metal chelates of racemic cis- and diequatorial trans-2,3-diamino-trans-decalins, cis- and trans-2,3-diaminotetralins and 3,3-dimethyl-1,2-diaminobutane (BEDA), where Cu(II), Ni(II) and Zn(II) are metal ions. Alicyclic trans-diamines afforded 1 :1 complexes more stable than those with cis-isomers, regardless of the metal ions. Stability of the metal chelates with BEDA is comparable to that of the trans-diamines. The difference in stability of the trans- and cis-diamine complexes increased in the order Cu-, Zn- and Ni ions. Upon formation of 1 : 2 complexes, it became greater with Ni ion, but practically no difference was observed with the others. An explanation was given on the basis of stereochemistry of the diamines and coordination structures of the divalent metal ions.