Diversity of supramolecular architecture of H₂ salpn coordination compounds based on its flexibility

Two complexes, Cu(saipn)·NH(CH₃)₂ (1) and Ni(saipn)·H₂O (2) (H₂salpn=N, N-bis(salicylidene)-propane-1,3-diamine) were characterized by IR, element analysis and single crystal X-ray diffraction analysis. Crystal data for complex 1: monoclinic, P2₁/C, a=1.097.4×10^-7cm, b=1.480.6×10^-7cm, c=1.031.5×10^-7cm, β =94.43(3))°. The Cu (Ⅱ) ion in complex 1 is four coordinated with distorted square planar coordination geometry. The crystal structure of complex 1 consists of coordination complex and a guest molecule NH(CH₃)₂ that can act as both H-bonding donor and acceptor and plays an important role in constructing supramolecular architecture. Crystal structure data for complex 2: orthorhombic, Pnma, a=8.676.3×10^-8cm, b=2.414.5×10^-7cm, c=7.538.8×10^-8cm. The Ni(Ⅱ) ion in complex 2 is five-coordinated with a butterfly coordination geometry. The coordinated water molecule plays a key role in hydrogen-bonded networks.