Stereochemistry of cage amine complexes - probing the ligand conformational flexibility with hydrogen bonds

摘要

Structure determinations for some Co(III) complexes of simple derivatives of the cage hexamine 3,6,10,13,16,19-hexa-azabicyclo.6.6.6]icosane ("sarcophagine") show that there is no evidence that the H-bonding involving the NH centres of the complex cations is influenced by electronic effects due to the substituents. "H-bond chelation" of chloride anions or water molecules results in retention of the symmetrical lel(3) conformation.