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

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Published in CrystEngComm. 2009, vol. 11, no. 7, p. 1416-1426
Abstract The crystal structures of eleven salts of protonated cations of composition benzimidazole-(CH2)nbenzimidazole with n between 2 and 6 are reported. Three interactions dominate the crystal structures (in order of decreasing importance): hydrogen bonding with the benzimidazolonium cations acting as H-bond donors and the anions or solvent molecules as acceptors; stacking of the benzimidazolonium cations; an interaction between anion and the C2 atom of the protonated benzimidazole which is assumed to be electrostatic in origin. Changes in anion do not have a great effect, but as the length of the (CH2)n spacer increases stacking becomes less favoured.
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VERDAN, Simon et al. Molecular bricklaying II. Anion and chain length effects in bisbenzimidazolonium salts. In: CrystEngComm, 2009, vol. 11, n° 7, p. 1416-1426. https://archive-ouverte.unige.ch/unige:6653

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Deposited on : 2010-05-21

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