  We employ the Grand Canonical Adaptive Resolution Molecular Dynamics
Technique (GC-AdResS) to test the spatial locality of the 1-ethyl 3-methyl
imidazolium chloride liquid. In GC-AdResS atomistic details are kept only in an
open sub-region of the system while the environment is treated at
coarse-grained level, thus if spatial quantities calculated in such a
sub-region agree with the equivalent quantities calculated in a full atomistic
simulation then the atomistic degrees of freedom outside the sub-region play a
negligible role. The size of the sub-region fixes the degree of spatial
locality of a certain quantity. We show that even for sub-regions whose radius
corresponds to the size of a few molecules, spatial properties are reasonably
{reproduced} thus suggesting a higher degree of spatial locality, a hypothesis
put forward also by other {researchers} and that seems to play an important
role for the characterization of fundamental properties of a large class of
ionic liquids.
