Abstract
Magnetic birefringence has been used in studying the spatial structure of a series of dipyridyl derivatives in hydrochloric acid solutions, and also some of their quaternary salts in water. It has been shown that when the change is made from the molecular forms of the 2,2′- and 4,4′-dipyridyls to their protonated mono and bis derivatives, the angles of rotation of the aromatic rings are very little changed; in the methylated cation, the degree of acoplanarity increases.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2771–2775, December, 1991.
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Timosheva, A.P., Kushnikovskii, I.A., Vul'fson, S.G. et al. Cotton-mouton constants and spatial structure of 2,2′- and 4,4′-dipyridyls and their salts in solutions. Russ Chem Bull 40, 2415–2418 (1991). https://doi.org/10.1007/BF00959712
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DOI: https://doi.org/10.1007/BF00959712