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The reaction of 2‐(4‐methyl‐2‐pyridyl)benzimidazole and of its N long alkyl chain derivatives with 1,3‐dibromopropane led to cyclic bis‐charged salts. Their spectroscopic (nmr and uv) and surface properties are briefly discussed. It turned out to be interesting to compare the similar behaviour of these salts and the corresponding well known derivatives of 2,2′‐bipyridyl.
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Barni et al. (1983) studied this question.
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