Abstract
Two Schiff base metal complexes [Cu–SPETN·NO3 (1) and Ni–SPETN·NO3 (2) [SPETN = 2,2′-[propane,1,3-diylbis(nitrilomethyldyne)pyridyl,phenolate]] with hydrogen bonding groups have been synthesized and characterized by single-crystal X-ray diffraction. In both of the compounds nitrates occupy a crystallographic general position. In 1 the lattice nitrates are on the 21 screw axis while in 2 they are at the crystallographic inversion center. C–H···Onitrate synthons (formed by the nitrate anions and peripheral hydrogen bonding groups of the metal complexes) are non-covalent building blocks in molecular-assembly and packing of the cationic Schiff base metal complexes (M = Ni2+, Cu2+), resulting in 2-D hydrogen bonded networks. The Cu···Cu non-bonding contact in 1 is 3.268 Å while the Ni–Ni bonding distance in 2 is 3.437 Å.
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