Syntheses, crystal structures, spectroscopy, and catalytic properties of two nickel-based hexaazamacrocyclic complexes with carboxylate ligands

[NiL1](ClO4)2 and [NiL2](ClO4)2 complexes were synthesized and used as precursor to synthesize [NiL1(4-nba)2] and [NiL2(sal)2] complexes which were characterized with various techniques and X-ray diffraction analysis. Subsequently, the catalytic properties of both complexes in the degradation of methyl orange were investigated.172