Supramolecular complexes of Ni (II) and Co (II) 4‐aminobenzoate with 3‐cyanopyridine: Synthesis, spectroscopic characterization, crystal structure, and enzyme inhibitory properties

Abstract

Two new complexes, [M (AB)2(CP)2(H2O)2] (where M = Ni and Co AB = 4‐aminobenzoate and CP = cyanopyridine), were synthesized and characterized using different techniques (elemental analysis, FT‐IR spectrophotometer, LC/MS, single‐crystal X‐ray diffraction, and TGA/DTA analysis). As a result of X‐ray structural analysis, it was determined that complexes are isostructural. In the crystalline structures, MII ions are bridged with their carboxylate oxygen and aminopyridine nitrogen atoms and their symmetry‐related counterparts to form a two‐dimensional polymeric structure. The MII ion is octa‐coordinated with two nitrogen atoms and two oxygen atoms of the AB and two atoms of the CP anions. In this study, the effect of these molecules, containing a biologically active group, was investigated on important metabolic enzymes (carbonic anhydrase isoenzymes I and II (hCA I and II), achethylcholinesterase (AChE), and α‐glycosidase (α‐Gly) enzymes).