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Plyers-shaped diamines II. 3-Amino-2,4-cyclogranatane diastereomers — A study of influence of structure on the properties of diamines

✍ Scribed by Elmar Vilsmaier; Thomas Herweck; Uwe Bergsträßer

Book ID
104208638
Publisher
Elsevier Science
Year
1998
Tongue
French
Weight
736 KB
Volume
54
Category
Article
ISSN
0040-4020

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✦ Synopsis

3-Amino-2,4-cyclogranatane 313-and 3a-diastereomers can be synthesized from the corresponding 313-carbonitriles by a kine~ically and a thermodynamically controlled reductive decyanation, respectively. Comparison of both diastereomers with respect to basicity, ionization potentials and behaviour towards oxygen demonstrates the influence of the lone pair -lone pair interaction on the properties of diamines. An X-ray structural analysis of a protonated syn diamine established an N. • • N -distance of 2.72 A in this new type of compounds.

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## Abstract The ligand (N^1^‐[3‐(2‐aminoethylimino)‐1,1‐dimethylbutyl]ethane‐1,2‐diamine), L^1^, induces a high ligand field on the central Ni^II^ ion. Thus it is relatively easy to oxidize(Ni^II^L^1^)^2+^. However, the kinetic stability of the Ni^III^L^1^ complexes is considerably lower than that