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

Two complexes,[Cu（salpn） ]·NH（ CH3）2（ 1） and [Ni（ salpn）·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 = 1.0974 × 10-7cm,b = 1.4806 × 10-7cm,c = 1.0315 × 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 [Cu（ salpn） ] coordination complex and a guest molecule NH（ CH3）2that 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 = 8.6763× 10-8cm,b = 2.4145 × 10-7cm,c = 7.5388 × 10-8cm. The Ni（ II） ion in complex 2 is fivecoordinated with a butterfly coordination geometry. The coordinated water molecule plays a key role in hydrogen-bonded networks.