NDLI: Cobalt(II), copper(II), zinc(II) and cadmium(II) complexes based on dibenzimidazolyl bidentate ligands with alkanyl linkers: crystal structure, weak interactions and conformations

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Wang, Xiu-guang Liu, Qing-xiang Li, Shu-juan Wei, Qing Zhao, Xiao-jun Wang, Hong
Description	Author Affiliation: Liu QX ( Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Ministry of Education, College of Chemistry, Tianjin Normal University, Tianjin 300387, China.)
Abstract	Eight metal complexes, $\{[Co(bibim-4)_{2}(H_{2}O)_{2}](NO_{3})_{2}\}_{n}$ (1), $\{[Cu(bibim-4)_{2}(NO_{3})](NO_{3})\}_{n}$ (2), $[Co(bibim-3)(TP)]_{n}$ (3), $[Zn_{2}(bibim-3)]_{2}(OAc)_{4}]$ (4), $[Co(bibim-2)(NO_{3})_{2}]_{n}$ (5), $[Zn(bibim-4)(NO_{3})_{2}]_{n}$ (6), $[Zn(bibim-4)(OAc)_{2}]_{n}$ (7) and $[Cd(bibim-4)(NO_{3})_{2}(DMF)]_{n}$ (8) (bibim-2 = 1,2-bis(benzimidazol-l-yl)ethane, bibim-3 = 1,3-bis(benzimidazol-l-yl)propane, bibim-4 = 1,4-bis(benzimidazol-l-yl)butane and TP = terephthalate) have been prepared by means of the self-assembly of Co(II), Cu(II), Zn(II) or Cd(II) salts, dibenzimidazolyl bidentate ligands bearing alkanyl linkers and terephthalic acid . These complexes are structurally characterized by X-ray diffraction analyses. In complexes 1 and 2, 2D network layers with macrometallocycles are formed via metal centers and the ligand bibim-4. A 2D network layer with macrometallocycles in 3 is formed via Co(II) centers, the ligand bibim-3 and terephthalate molecules. In complex 4, a 20-membered macrometallocycle is formed by two bibim-3 ligands and two Zn(II) atoms. In complexes 5–8, 1D polymeric chains are formed via metal centers and the bibim-2 or bibim-4 ligands . In the crystal packings of complexes 1–8, 2D supramolecular layers and 3D supramolecular frameworks are formed via intermolecular weak interactions, including π–π interactions and hydrogen bonds. The different types of π–π interactions from the benzimidazole ring as well as the conformations of the ligands and metal complexes are described. Additionally, the fluorescence emission spectra of the ligands and metal complexes are reported.
ISSN	14779226
Issue Number	16
Journal	Dalton Trans.
Volume Number	42
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2013-04-28
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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