LAUSR

Abstract One 2p-3d-4f multispin complex [Cu(hfac)(4-Me-3-NITtrz)2][Tb(hfac)4]·H2O (1) has been obtained based on a functionalized nitronyl nitroxide radical 4-Me-3-Nit-trz (in which, 4-Me-3-Nit-trz = 2-[3-(4-methyl-l,2,4-triazolyl)]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, hfac = hexafluoroacetylacetone). Complex 1 crystallizes in tetragonal system, I 4 ¯ space group. The central CuII ion is six-coordinated in tensile octahedron configuration finished by two bidentate radical ligands and one bidentate hfac anion, while TbIII ion exhibited as distorted triangular dodecahedron geometry (D2d) finished by eight oxygen atoms from four bischelate hfac anions. Magnetic studies show that Cu(II) ion and the NO group are antiferromagnetically coupled with coupling constants of JCu–rad = 1.76~1.99 cm−1, and strong antiferromagnetic exchange interactions between the two intramolecular radicals with Jrad–rad = -12.88~-10.42 cm−1 exist in 1. In addition, alternating current (ac) magnetic susceptibilities were further measured.