Five crystal structures containing trinuclear Cu(II)-4-formyl pyrazolato units are reported: a 0-D Cu3 complex ((Ph4P)2[1]) was prepared in the presence of terminal chloride ligands, a 3D polymer with dia topology and 3-fold interpenetrated structure ([2](CF3SO3)2) involved 1,2-bipyridylethylene (bpe) linkers, while a second 1-D polymer ([3](CF3SO3)2) formed by linking SBUs via formyl group coordination. Two 3D polymers ([4](CF3SO3)2 and [5](ClO4)2) with novel topologies consist of 14-nodal 38,42,54-c and 3-nodal 3,3,4-c nets, respectively.
