We propose to use neutron total scattering to characterise isocyanate (NCO-) orientations within the orientationally-disordered phase of AgNCO. The arrangement of NCO- ions in this phase is that of separated 2D triangular nets, and is hence a molecular analogue of magnetic frustration on the triangular lattice. By collecting total scattering data at two temperatures below the order/disorder transition, one at the transition temperature, and two above the transition temperature, we will be able to characterise (i) the form of this orientational disorder, (ii) its relationship to frustrated spin fluctuations on the triangular lattice, and (iii) the temperature dependence of dipole correlations. A sixth data point in a quenched phase will identify "orientational glass" behaviour in AgNCO. The total scattering data will be analysed using RMC methods.