Novel CuII–MII–CuII (M = Cu or Ni) trinuclear and [NaI 2CuII 6] hexanuclear complexes assembled by bi-compartmental ligands: syntheses, structures, magnetic and catalytic studies

In the present work, two compartmental ligands H2L1 and H2L2 were in situ generated during the synthesesof new trinuclear complexes, [Cu2Ni(L1)(2,2’-bpy)2(NO3)2][ClO4]2 (5), [Cu3(L2)(NO3)2][ClO4]2 (6), and[Cu3(L2)(NCS)2(NO3)]+ that co-crystallize in 7 with a [Cu6(L2)2Na2(NO3)6(NCS)4] unit to give the final molecularformula [Cu6(L2)2Na2(NO3)6(NCS)4][Cu3(L2)(NCS)2(NO3)]2(NO3)2·5H2O (7). The magnetic propertystudies of 5–7 revealed weak CuII–CuII ferromagnetic interactions in compound 6 (JCu–Cu/kB = +1.4(1) K)and 7 (JCu–Cu/kB = +1.6) while in intranuclear CuII–NiII–CuII compound 5, the magnetic couplingbetween two CuII ions is switched off by the diamagnetic square planar NiII bridge.....