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Dibromido[(1R,2R,NS)-N-(pyridin-2-ylmeth-yl)cyclo-hexane-1,2-diamine-κN,N',N'']cadmium
Run-Ting Yin1, Zhe Cao, Lin Cheng
1Department of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, People's Republic of China.
Abstract:
In the title compound, [CdBr(2)(C(12)H(19)N(3))], the Cd(II) atom is coordinated by the three N atoms of the (1R,2R)-N-(pyridin-2-ylmeth-yl)cyclo-hexane-1,2-diamine ligand and a bromide ion in the basal plane, and by a second bromide in the apical position. The coordination environment can be described as distorted square pyramidal. The coordination of the enanti-o-pure ligand to the metal atom renders the central N atom chiral with an S configuration, so the complex is enanti-omerically pure and corresponds to the S,R,R diastereoisomer. In the crystal, the mol-ecules are linked via weak N-H⋯Br hydrogen bonds into a chain parallel to the b axis.
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Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
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