  Several computer simulation studies of aqueous dimethylsulfoxyde with
different force field models, and conducted by different authors, point out to
an anomalous depressing of second and third neighbour correlations of the
water-water radial distribution functions. This seemingly universal feature can
be interpreted as the formation of linear water clusters. We test here the
ability of liquid state integral equation theories to reproduce this feature.
It is found that the incorporation of the water bridge diagram function is
required to reproduce this feature. These theories are generally unable to
properly reproduce atom-atom distribution functions. However, the near-ideal
Kirkwood-Buff integrals are relatively well reproduced. We compute the Xray
scattering function and compare with available experimental results, with the
particular focus to explain why this data does not reproduce the cluster
pre-peak observed in the water-water structure factor.
