Compounds [{(Mn4(H2-Bbim)4(Bbim)4}.2CH3OH.2H2O]n (1  ), [Ni(H2-Bbim)3]Cl2.3H2O (2  ),  Cr[(H-Bbim)3].3H2O (3  ), and [Zn2(Bbim)3] (4  ) were synthesized by the reaction of 2,2'-bisbenzimidazole (H2-Bbim) and metal ions under hydrothermal conditions. The products were characterized by single-crystal X-ray diffraction analysis. Compound 1   is a   1-D   zigzag polymeric chain. Compound 2   displays a 2D layer structure which is stabilized via hydrogen bonds, ?-? and Cl�? interactions. In compound 3  the water tetramers extend the layers to a 3D supramolecular framework by intermolecular hydrogen bonds. Compound 4  crystallizes in a triclinic chiral space group P1. The two crystallographically independent Zn2+ ions in compound 4  adopt a 2D honeycomb network. The intramolecular neighboring Zn�Zn distances range from 5.380 �  to 5.956 �. Interestingly, bridging imidazolyl groups connect two adjacent metal ions into a helical chain along the c-axis, and these helices are alternately arranged in a left- and right-handed manner.

Design of chiral bisbenzimidazole-containing metal-organic framework

244th National Meeting (2012)

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