Heptacopper(II) and dicopper(II)-adenine complexes: synthesis, structural characterization, and magnetic properties

摘要: The syntheses, crystal structures, and magnetic properties of two new copper(II) complexes with molecular formulas [Cu7(μ2-OH2)6(μ3-O)6(adenine)6](NO3)2·6H2O (1) [Cu2(μ2-H2O)2(adenine)2(H2O)4](NO3)4·2H2O (2) are reported. heptanuclear compound is composed a central octahedral CuO6 core sharing edges six adjacent copper octahedra. In 2, the octahedra shares one equatorial edge. both compounds, these basic cluster units further linked by water bridges bridging adenine ligands through N3 N9 donors. All centers exhibit Jahn–Teller distorted coordination characteristic d9 center. study heptacopper complex revealed dominant ferromagnetic intra-cluster interaction, while dicopper exhibits antiferromagnetic intra-dimer interactions weakly inter-dimer interaction.