A New Di-Copper(II) Complex of Schiff-Base and 1,3-Di(pyridin-4-yl)propane Ligands: Synthesis, Spectral, Thermal Properties, and Crystal Structure

A new binuclear copper(II) complex with the Schiff-base ligand N-(2-hydroxybenzyl)aminomethanesulfonic acid (H2Saes) has been synthesized, [Cu(Saes) (1,3-dpp)]2 (1,3-di(pyridin-4-yl)propane abbreviation as 1,3-dpp) (1), and characterized by single-crystal X-ray diffraction, elemental, IR spectra, and thermogravimetric analyses. Complex 1 shows phenoxo-bridged dinuclear Cu2O2 core with intermetallic distance of 3.19 (8) angstrom. In the crystal structure, 1D infinite chain structure is formed through weak - stacking interactions between the phenyl rings of adjacent dimmer units with ring-centroid distances of 3.787 (4) angstrom. In addition, 2-D layers structure are formed by intermolecular C-H center dot center dot center dot O hydrogen bonds with the separate C center dot center dot center dot O distances of 3.278 (8)-3.533 (9) angstrom. Molecules from neighboring stacks further interdigitate with each other in the c-direction, leading to an interwoven three-dimensional network held together by C-H center dot center dot center dot O interactions and -stacking and stabilize the coordination complex.