Poly[[2-(3-pyridinio)-1H,3H-benzimidazolium] [?(4)-oxido-di-?(3)-oxido-tetra-?(2)-oxido-hexa-oxidotetra-molybdenum(VI)]].

ABSTRACT: The reaction of MoO(3) with 2-(3-pyrid-yl)benzoimidazole and water in the presence of MnSO(4)·5H(2)O at 453?K under hydro-thermal conditions afforded the title compound, {(C(12)H(11)N(2))[Mo(4)O(13)]}(n), in which infinite molybdenum oxide anionic chains are charge-balanced by diprotonated 2-(3-pyrid-yl)benzoimidazole (H(2)3-PBIM(2+)) cations. Eight [MoO(6)] octa-hedra are edge-shared, forming compact octa-molybdate subunits which are connected through pairs of Mo-O-Mo bridges into extended one-dimensional arrays propagating along the a-axis direction. The asymmetric unit of the metal oxide chain contains one half of the octa-molybdate unit, denoted [Mo(4)O(13)], the other half being generated by an inversion center. These molybdenum oxide chains are further connected through the 2-(3-pyridinio)benzoimidazolium cations into a three-dimensional network via N-H?O hydrogen bonds. In addition, neighbouring diprotonated cations are arranged in a head-to-tail fashion with a plane-to-plane separation of 3.63?(10)?Å, indicating the existence of weak aromatic ?-? stacking inter-actions.

SUBMITTER: Chen LJ 

PROVIDER: S-EPMC2977567 | biostudies-literature | 2009 Apr

REPOSITORIES: biostudies-literature