Local order in fully deuterated liquid acetic acid as studied by neutron scattering. Complementarity to X-ray results

A structural investigation of fully deuterated liquid acetic acid (AAd4) was performed at 298 K and atmospheric pressure by using neutron scattering. The recorded data are analyzed to yield the total structure factor SM(q), the molecular form factor F1(q), the distinct pair correlation function gL(r) and the second signature of H-bonding, i.e. the deuterium oxygen interaction. Neutron scattering data, as well as recent X-ray studies, clearly show that the local order of the liquid is largely described by the short-range crystal structure.