To explore the influence of ligand backbones on the structures of coordination architectures, three structurally related rodlike ligands bearing different backbones, 1,4-bis(benzoimidazol-1-yl)-phenyl (L 1 ), 1,4-bis(imidazol-1-yl)-benzene (L 2 ), and 4,4′-bis(imidazol-1-yl)-biphenyl (L 3 ), have been employed to react with Co(ClO4)2·6H2O, and three three-dimensional interpenetrating coordination polymers, {[Co(L 1 ) 2 ](ClO 4 ) 2 }∞ (1), {[Co(L 2 ) 3 ](ClO 4 ) 2 (CHCl 3 ) 2 }∞ (2), and {[Co(L 3 ) 3 ](ClO 4 ) 2 }∞ (3), have been obtained under similar conditions. Compound 1 forms a 3-fold interpenetrating network with diamondoid topology based on a tetrahedrally coordinated CoII node, whereas complex 2 takes a double interpenetrating network with α-polonium-type topology and compound 3 exhibits a 3-fold interpenetrating network with β-Sn topology. Compared with the tetrahedrally coordinated CoII node in compound 1, the CoII nodes in compounds 2 and 3 are both octahedrally coordinated. To the best of our knowledge, the 3-fold interpenetrating network of compound 3 is the first example of β-Sn 485463 topology in coordination polymers. Our results reveal that ligand backbones (including terminal groups and spacer conformations) may be the major influence on the structure topology of coordination architectures, and significantly, the coordination mode and spacer length play important role in controlling the degree of interpenetration of coordination polymers.
The molecule of the title compound, C26H18N4, resides on a crystallographic inversion centre with a dihedral angle of 44.94 (5)° between the benzimidazole ring system and the benzene ring. The primary hydrogen bond is C—H⋯N and inversion-related pairs of these generate a chain of rings along the c-axis direction; π⋯π stacking involving the benzimidazole groups with interplanar separations of ca 3.4 Å complete the interactions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.