Synthesis and structure of 1,3-dimethyl-5-( p -sulfonamide-phenylazo)-6-aminouracil and its Ni(II) complex: Topological insights and investigation for noncovalent interactions
at the M06-2X/def2TZVP level of theory, are employed to characterize a great variety of non-covalent interactions that explicitly show the importance of antiparallel stacking interactions established by π−–π+ interactions and H-bonds in the self-assembled dimmers in HL and lp–π/C–H⋯π interactions in NiIIL2. The results of NMR and UV–vis spectroscopies evidence that the ligand exists in hydrazone-imine-keto