Structural insights into three novel Cu(II), Ni(II) and Zn(II) complexes derived of a pyridine-containing N4-cavity bisoxime ligand

Three novel N4-cavity Cu(II), Ni(II) and Zn(II) mononuclear complexes, [Cu(L)(NO3)2][Cu(L)(NO3)]NO3 (1) [Ni(L)(NO3)2] (2) and [Zn(L)(NO3)2] (3) were successfully synthesized via the reactions of a pyridine-containing N4-cavity bisoxime ligand L (L = 2,2'-[Ethylenedioxobis(azetidinyl)]pyridine) with Cu(II), Ni(II) and Zn(II) nitrates, respectively. Complexes 1-3 were characterized via elemental analysis, IR, UV-Vis spectra and X-ray crystallography. All three complexes are monoclinic systems, containing one M(II) atom and one (L) ligand moiety. Complexes 2 and 3 form centrosymmetric molecules. In addition, supramolecular interactions, Hirshfeld surface analysis were used to analyze the crystal properties that have been studied.