In this study, we synthesized a structurally simple cubane-type tetranuclear Ru complex, [Ru₄Cp₄{B(CN)₄}₄] (1), to explore crystal engineering aspects of cubane-type molecular assemblies using cyanoborate anions. Such a perspective may be of interest, given the considerable attention to the crystal engineering of organic cubane derivatives. Complex 1 yielded various pseudopolymorphs upon recrystallization. In contrast to the previously reported tetraalkyl complex, it features four free CN coordinating sites. Taking advantage of this feature, the complex was used as a bridging ligand to construct CPs, resulting in lowdimensional MOFs with solvent-accessible voids. cubane-type tetraalkyl tetranuclear Ru complexes