Water structure in aqueous solutions of tetramethylammonium chloride

Abstract

Neutron diffraction with hydrogen/deuterium isotope substitution is used to investigate the water structure and the solute distribution in aqueous solutions of tetramethylammonium chloride ((CH3)4NC1) between 2·0 and 8·0m concentrations at room temperature. The hydrogen-hydrogen (HH) pair correlation functions for the water indicate that the hydrogen-bonding geometry is not significantly changed over the concentration range compared to pure water, although the number of hydrogen bonds to nearest-neighbour water molecules decreases with increase in anion concentration. The results show no evidence of increased water structure compared to pure water in either the nearest-neighbour or the longer distance range. © 1992 Taylor & Francis Group, LLC.