Zinc(II) complexes of amide- and urea-substituted 8-hydroxyquinolines
摘要:
A series of amide- and urea-substituted 8-hydroxyquinoline ligands 1-6-H are used for the formation of zinc(II) complexes. Hereby in general 2:1 complexes are obtained and the X-ray structure of [(3)(2)Zn] reveals the presence of a coordination polymer in the solid state. Only the derivatives of 7-amino-8-hydroxyquinoline 4-H and 5-H form trinuclear hexa-helical 6:3 complexes which exhibit interesting structural and NMR and fluorescence spectroscopic properties. (C) 2002 Elsevier Science B.V. All rights reserved.
Amide- and urea-substituted 8-hydroxyquinoline derivatives 3, 5, and 7 are prepared by standard methods. In the solid state 3a, 5d, and 7 form 8-hydroxyquinoline dimers with bifurcated inter- and intramolecularhydrogen bonds.
A series of amide- and urea-substituted 8-hydroxyquinoline ligands 1-6-H are used for the formation of zinc(II) complexes. Hereby in general 2:1 complexes are obtained and the X-ray structure of [(3)(2)Zn] reveals the presence of a coordination polymer in the solid state. Only the derivatives of 7-amino-8-hydroxyquinoline 4-H and 5-H form trinuclear hexa-helical 6:3 complexes which exhibit interesting structural and NMR and fluorescence spectroscopic properties. (C) 2002 Elsevier Science B.V. All rights reserved.