catena-Poly[[[(N,N,N′,N′-tetramethylethylenediamine)copper(II)]-μ-oxalato] tetrahydrate]

Abstract

In the title compound, {[Cu(C2O4)(C6H16N2)].4H2O}n, the Cu atom is six-coordinate in a distorted octahedral geometry, and N,N,N',N'-tetramethylethylenediamine acts as a chelating ligand. The oxalate anion, which lies about an inversion centre, bridges the metal cations and forms infinite chains. The structure cohesion is ensured by hydrogen-bonding interactions, which form a three-dimensional framework.

1D and 2D Cobalt(II) Coordination Polymers, Co(ox)(en): Synthesis, Structures and Magnetic Properties

“…The octahedral coordinate in zigzag chains can adopt terminal ligand positions by monodentate or chelating bidentate ligands, while linear chains can only adopt monodentate ligands. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] On the other hand, 2D layered structures contain bridging multidentate ligands such as 2,2'-bipyrimidine, pyrazine, and 4,4'-bipyridine (bpy), which are obviously different from chelating bidentate ligands found in 1D structures. [18][19][20][21][22][23][24][25] The geometric patterns of the layers are essentially distinguished by the facility and number of chelating ligands in the structures.…”