A versatile synthesis is reported for 5-(aryl­methyl­idene­amino)-4-(1H-benzo[d]imidazol-1-yl)py­rimi­dines and structures are reported for three examples, one of them in two crystal forms, as well as for two inter­mediates in the synthetic sequence. A diverse range of hydro­gen-bonding patterns leads to supra­molecular assemblies ranging from finite zero-dimensional aggregates to three-dimensional framework structures.