Acta Crystallographica Section C

Crystal Structure Communications

Volume 64, Part 12 (December 2008)

metal-organic compounds

sk3269 scheme

Acta Cryst. (2008). C64, m401-m404 [ doi:10.1107/S0108270108038328 ]

Influence of nitrogen-containing chelating ligands on the structures of zinc(II) 4,4'-ethylenedibenzoates

X.-Y. Wang, J.-J. Wang and S. W. Ng

Abstract: The Zn^II compounds, [mu] -4,4'-ethylenedibenzoato-bis[acetatoaqua(dipyrido[3,2-a:2',3'-c]phenazine)zinc(II)] dihydrate, [Zn₂(C₂H₃O₂)₂(C₁₆H₁₀O₄)(C₁₈H₁₀N₄)₂(H₂O)₂]·2H₂O, (I), and catena-poly[[[aqua(pyrazino[2,3-f][1,10]phenanthroline)zinc(II)]- [mu] -4,4'-ethylenedibenzoato] N,N-dimethylformamide hemisolvate], {[Zn(C₁₆H₁₀O₄)(C₁₄H₈N₄)(H₂O)]·0.5C₃H₇NO}_n, (II), display very different structures because of the influence of the N-donor chelating ligands. In (I), the coordination geometry of each Zn^II centre is distorted octahedral, involving two N atoms from one dipyrido[3,2-a:2',3'-c]phenazine (L1) ligand, and four O atoms from one bis-chelating acetate anion, one bridging 4,4'-ethylenedibenzoate (bpea) ligand and one water molecule. Adjacent Zn^II atoms are bridged by one bpea ligand to form a dinuclear complex, and the dinuclear species is centrosymmetric. Two types of [pi] - [pi] interactions between neighbouring dinuclear species have been found: one is between the L1 ligands, and the second is between the L1 and bpea ligands. In this way, an interesting two-dimensional supramolecular layer is formed. The layers are further linked by O-HO and O-HN hydrogen bonds, generating a three-dimensional supramolecular network. In (II), each Zn^II atom is square-pyramidally coordinated by two N atoms from one pyrazino[2,3-f][1,10]phenanthroline ligand, three O atoms from two different bpea ligands and one water molecule. The two bpea dianions are situated across inversion centres. The bpea dianions bridge neighbouring Zn^II centres, giving a one-dimensional chain structure in the ab plane. As in (I), two types of [pi] - [pi] interactions between neighbouring chains complete a three-dimensional supramolecular structure. The results indicate that the structures of the N-donor chelating ligands are the dominant factors determining the final supramolecular structures of the two compounds.

Formula: [Zn₂(C₂H₃O₂)₂(C₁₆H₁₀O₄)(C₁₈H₁₀N₄)₂(H₂O)₂]·2H₂O and [Zn(C₁₆H₁₀O₄)(C₁₄H₈N₄)(H₂O)]·0.5C₃H₇NO


	Structure factor file (CIF format) (232.9 kbytes) [ doi:10.1107/S0108270108038328/sk3269Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (270.1 kbytes) [ doi:10.1107/S0108270108038328/sk3269IIsup3.hkl ] Contains datablock II

Notes:

To open or display or play some files, you may need to set your browser up to use the appropriate software. See the full list of file types for an explanation of the different file types and their related mime types and, where available links to sites from where the appropriate software may be obtained.

The download button will force most browsers to prompt for a file name to store the data on your hard disk.

Where possible, images are represented by thumbnails.

Search: From to Advanced search