Molecular bricklaying II. : Anion and chain length effects in bisbenzimidazolonium salts

Seven organic salts assembled from hydrogen-bonds of N–H⋯O, O–H⋯O, and C–H⋯O between acidic compounds and bis(benzimidazole)

“…Table 2 Summary of X-ray crystallographic data for complexes 5-7. 39]. In the compound, there are two ion pairs with two water molecules accompanied, which is well agreement with the micro-analysis results.…”

Crystal structure of 3-(2-hydroxyethyl)-2-methylsulfanyl-6-nitro-3H-benzimidazol-1-ium chloride monohydrate

“…The least-squares plane of the nitro group (C7/N12/O6/O8) lies close to the benzimidazolium ring system, making a dihedral angle of 4.86 (9) . In the structure, the bond lengths and angles of the benzimidazolium ring are generally in good agreement with those observed in related structures (Morozov et al, 2004;Verdan et al, 2009;Chen et al, 2010;Yuasa et al, 2010;Gao et al, 2013;Samsonov et al, 2013;Liu et al, 2014). In addition, the C7-N12 bond length, 1.4667 (19) Å shows that the nitro group is not involved in conjugation with the adjacent -system and hence has no effect on the charge distribution of the heterocyclic ring.…”

“…A CSD search (Web CSD version 5.37; August 19, 2016; Groom et al, 2016) found eight benzimidazolium structures with substituents at the 1 and 2 positions of the imidazolium ring system (Morozov et al, 2004;Verdan et al, 2009;Chen et al, 2010;Yuasa et al, 2010;Gao et al, 2013;Samsonov et al, 2013;Liu et al, 2014;Kerimov et al, 2012). In these structures, the imidazolium rings generally show two long (in the range 1.36-1.40 Å ) and two short (1.30-1.34 Å ) C-N distances.…”

Synthesis, Crystal Structures, and Catalytic Properties of Silver(I) and Cobalt(II) Coordination Polymers Based on Flexible Bis(benzimidazole) with Pyridine‐2, 6‐Dicarboxylate

“…Benzimidazoles are involved in a great variety of biological processes and contain both the imidazole ring and a larger conjugated π system, capable of acting as hydrogen‐bond donors and for π–π stacking interaction. Some of their polyfunctional derivatives have been proved to have antibacterial, fungicide, and antihelmintic activity 1–3. So, the research concerned with the properties of coordination compounds containing benzimidazole has attracted the interest of various research groups 4–13.…”