氮氧自由基单核钬配合物的合成与结构

A novel mononuclear Ho(Ⅲ) nitronyl nitroxide complex [Ho(hfac)₃(NITPhDma)₂], (NITPhDma=2-(4-dimethylamino-phenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, hfac=hexafluoroacetylacetonate), was synth-esized and structurally characterized by X-ray diffraction. It crystallizes in monoclinic, space group P2₁/n with a=1.274 5(1) nm, b=1.753 1(2) nm, c=2.482 8(2) nm, β=93.753(2)°. The Ho(Ⅲ) ion is eight-coordinated with a distorted dodecahedron environment. Each NITPhDma radical acts as monodentate ligand towards Ho(Ⅲ) ion through the NO group, and the complex molecules are well isolated. CCDC: 775839.