Aggregation studies on long chain alkyl-ammonium salts in organic diluents—I The chloride, nitrate salts in benzene

Abstract

Listen

Translate article

The aggregation equilibria of tridodecyl-ammonium chloride and tridodecyl-ammonium nitrate in benzene have been investigated by studying the vapour-pressure lowering of the solutions with matched termistors at 25°C. For the chloride salt, measurements have been also carried out at 37°C. The existence of a monomer-dimer equilibrium for the chloride salts fits the experimental data. The equilibrium constants K 2 = 30 ± 3 at 37°C, K 2 = 50 ± 5 at 25°C have been calculated. The presence of dimer and trimer is necessary to explain the experimental data of the nitrate salt. K 2 = 65 ± 7 and K 3 = 39 ± 4 at 25°C have been calculated.