“…Multicarboxylate compounds are common O-donor ligands and their great richness and various coordination modes can generate unforeseen structure types [11][12][13]. With regard to the aliphatic dicarboxylate species, their two carboxylate groups are separated by -(CH 2 ) nspacers which can bend and rotate freely when coordinate to metal ions, thus enhance the possibility to produce multifarious coordination modes and novel structures [14][15][16].…”