Xie YS, Jiang H, Yu MG, Du CX, Liu QL, Xu XL, Zhu Y (2002d) Synthesis and 2D H-bonded Cu(II) network structure of Cu(2,2 ' bpy)(H2L1) (ClO4)(2) H2L1=1,2-bis((2-hydroxy-ethyl)amino)ethane. Journal of Molecular Structure 608(2-3), 169-173. [In English]

Web link: http://dx.doi.org/10.1016/s0022-2860(01)00964-4

Keywords:

crystal structures, copper(II) complexes, 2D networks, hydrogen bonds, electronic-properties, copper(ii) complexes, crystal-structure, coordination, perchlorate, ligands, chains,

Abstract: Complex [Cu(2,2'-bpy)(H2L1)](ClO4)(2) (1) has been self-assembled by the complexation of a potentially flexible tetradenate ligand 1,2-bis((2-hydroxyetheyl)amino)ethane (H2L1) and a chelating rigid ligand 2,2'-bipyridine (bpy) with Cu(II). Crystal analyses reveal that H2L1 acts as a tridenate ligand by the coordination of one alkoxyl O atom and two amino N atoms. Copper(II) coordinates additionally with the two N atoms of bipyridine, giving a distorted square pyramidal geometry. Each complex molecule is connected with four surrounding ones by hydrogen bonds along the ac plane, leading to 2D sheets constituted with 7.874 x 10.891 Angstrom metallomacrocyclic rectangles. Each vertex of the rectangle is occupied by a copper atom. The four sides are comprised of multiple hydrogen bonds. Electronic spectra of complex 1 showed a band maximum at 661 nm, the EPR spectra of 1 in frozen DMF at 100 K showed an axial spectrum with four hyperfine peaks in the g(parallel to) region, and g(parallel to) >, g(perpendicular to), consistent with a distorted square pyramidal copper(II) coordination geometry. (C) 2002 Elsevier Science B.V. All rights reserved.