Synthesis and Crystal Structure of Linear Chain Homotetranuclear Complexes with N₃ ⁻

Abstract

Mononuclear copper(II) complexes, Cu(L) [N,N′‐bis(salicylidene)‐1,3‐propanediaminato]copper(II), and Cu(LDM) [N,N′‐bis(salicylidene)‐2,2′‐dimethyl‐1,3‐propanediaminato]copper(II), were prepared from the ONNO type ligands N,N′‐bis(salicylidene)‐1,3‐diaminopropane (H2L) and N,N′‐bis(salicylidene)‐2,2′‐dimethyl‐1,3‐diaminopropane (H2LDM). These mononuclear complexes were transformed into tetranuclear complexes, [(S)Cu(L)Cu(N3)2]2 and [(S)Cu(LDM)Cu(N3)2]2 (S are solvent molecules, DMSO, DMF, THF, dioxan), with N3 ‐ and Cu(II) ions. All complexes were characterized by elemental analyses and IR spectroscopy. A molecular model of the complex [(DMSO)Cu(L)Cu(N3)2] was obtained by single crystal x‐ray diffraction methods.