K. Bernauer, T. Chuard, H. Stoeckli-Evans
Sep 22, 1993
Citations
0
Influential Citations
10
Citations
Journal
Helvetica Chimica Acta
Abstract
The three new optically active triamines derived from 2,6-bis(aminomethyl)pyridine, i.e. 2,6-bis{[(2S)-2-(hydroxymethyl)pyrrolidin-1-yl]methyl}pyridine (3a), 2,6-bis{[(2S)-2-(methoxymethyl)pyrrolidin-1-yl]methyl}-pyridine (3b), and 2,6-bis{{(2S)-2-[(benzyloxy)methyl]pyrrolidin-1-yl}methyl}pyridine (3c), were synthesized. The equilibrium behaviour in solution and CuII complex formation were studied by acidimetric titration and by UV/VIS and CD measurements. It was found that in aqueous solution, 3a can coordinate one of the CH2OH groups to CuII upon deprotonation. X-Ray crystal structures were determined for the complexes [Cu(3a)Cl]ClO4·H2O, [Cu(3b)Cl]ClO4, and [Cu(3c)Cl]ClO4. In the solid state, coordination of both the OH and the alkoxy groups was observed, and the three ligands are pentacoordinated.