The complex [(C18H18N4S)]HgBr2] crystallizes from solution in acetonitrile (CH3CN) to give triclinic crystals with a unit cell volume of 1113.5 3 and a density of

The complex [(C18H18N4S)]HgBr2] crystallizes from solution in acetonitrile (CH3CN) to give triclinic crystals with a unit cell volume of 1113.5 Å3 and a density of 2.16 g.cm-3. Calculate the number of molecules of complex per unit cell and the number of molecules of solvent (if present).