Abstract

It has been shown that the NO3− and Cl− ions in methylpyperidine, cetylmorpholine, quinuclidine, and triethyl quaternary ammonium salts (QAS) are characterized by approximately equal exchange constants KCl−NO3− despite a significant difference in the structure of QAS. For methylpyperidine, cetylmorpholine, and triethyl salts, KCl−NO3− are almost equal, which can be attributed to the special features of ethyl radicals fixed into the cycles, which occupy a smaller volume and thus reduce the effect of the length of the third substituent, so that the parameters of the closest approach become nearer.

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