investigated by 59Co NMR in aqueous solutions. Their structure and preference of certain isomeric formations were studied. It was found that for the [Co(dien)(NO2)2NH3]Cl complex, out of four geometric isomers observed, those with mer-configuration dominate. Trans-complexes with tetradentate ligand (trien), configurationally are more labile than cis-complexes and the stability of geometric isomers increases
然后在
水溶液中通过59 Co NMR研究了具有多齿
氨基螯合物的
配体(
二亚乙基三胺),
三烯(
三亚乙基四胺),四烯(
四亚乙基五胺)和环己酰胺(
1,4,8,11-四氮杂环十四烷)的配合物的立体异构化。研究了它们的结构和某些异构体形成的偏好。据发现,为[CO(二烯)(NO 2)2 NH 3 ] C1复合,挤出观察四种几何异构体,那些具有聚体构型占主导地位。反式与四齿
配体(
三烯)-complexes,构型上比更不稳定的顺式-complexes和几何异构体的增加的顺序稳定性反<α<β。当环状四齿配体(cyclam)配位成钴时,主要形成具有反式构型的配合物。发现了含有五齿
配体(四烯)的Co III配合物的所有四个替代几何异构体的形成。