Novel dioxotetrazamacrocyclic "sandwich" complexes synthesis and structural characterization Academic Article uri icon

abstract

  • Reaction of 1,4,7,10-tetraazacyclododecane-2,9-dione with copper and cobalt perchlorate in water at 1:1 molar ratio afforded two new crystal-engineered 1:2 'sandwich' type complexes. Both of them are isostructural analogues. Copper complex crystallized in monoclinic space group P21/c with a = 9.6888(12), b = 12.2956(16), c = 10.5661(13), = 104.965(2), V = 1216.0(3) 3, and Z = 2. The Cu(II) ions are six-coordinated by four nitrogen atoms and two amide oxygen atoms. Their coordination geometry can be described as Jahn-Teller distorted octahedra, with elongated Cu-O distances. (2.310(2) ) Cobalt complex crystallized in monoclinic space group P21/c with a = 9.7560(12), b = 12.237(16), c = 10.7130(13), = 105.194(3), V = 1234.2(4) 3, and Z = 2. The Co(II) ions are also six-coordinated by similar atoms as found in copper complex. But the bond lengths of Co-O 2.0881(13) are slightly shorter than respective Co-N. 2002 Elsevier Science B.V. All rights reserved.

published proceedings

  • INORGANIC CHEMISTRY COMMUNICATIONS

author list (cited authors)

  • Kong, D., Xiang, O. Y., Martell, A. E., & Clearfield, A.

citation count

  • 1

complete list of authors

  • Kong, D||Xiang, OY||Martell, AE||Clearfield, A

publication date

  • March 2003