Several water-bridged Mn 2+ dinuclear carboxylate complexes with similar local structures have been reported, featuring interatomic distances and angles (Mn-O = 2.18-2.45 Å, Mn•••Mn Mn ≈ 123°). The packing diagram of 1-Mn is shown in Fig. . or cage complexes are constructed in a single step via self-assembly, the present system represents a stepwise approach that may offer greater synthetic flexibility. These findings emphasize the potential of cyanoborate anions in structural design, and future research will focus on constructing polyhedral frameworks with larger internal cavities.