The structure of Cl-in aqueous solution: an experimental determination of gClH(r) and gClO(r)
- 9 August 1993
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 5 (32), 5723-5730
- https://doi.org/10.1088/0953-8984/5/32/003
Abstract
The first and second isotopic difference methods of neutron diffraction have been applied to solutions of 2 molal NiCl2 in H2O and 1.8 molal NiCl2 in D2O. The results were used to obtain the radial pair distribution functions gClH(r) and gClO(r). Analysis of these functions shows that Cl- is coordinated to 6.4(3) water molecules at near-neighbour Cl-H(1), Cl-O and Cl-H(2) distances of 2.28(3) AA, 3.1(1) AA and 3.7(1) AA respectively. The data transcend those obtained in previous studies, which were carried out only at the level of the first difference, and so provide a sharper test of theoretical results obtained from computer simulation or integral equations.Keywords
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