A series bi-spin transition metal(II) complexes based on triazole nitronyl nitroxide radical

作者：Li, Ting; Shi, Xiu Juan; Chen, Peng Yun; Yu, Si Jia; Tian, Li^*

来源：Inorganica Chimica Acta, 2017, 461: 206-212.

DOI：10.1016/j.ica.2017.02.025

• Radicals
• Nitronyl nitroxide
• Triazole
• Mononuclear
• Magnetic properties

Four new transition complexes were obtained by using triazole nitronyl nitroxide radical as ligand. The complexes with formula [Mn(4-Me-3-Nit-trz)(hfac)(2)] (1)and [M(4-Me-3-Nit-trz)(hfac)(2)](2) [M = Co(II)2, Ni(II)3, Cu(II)4; 4-Me-3-Nit-trz = 2-[3-(4-methyl-l, 2,4-triazolyl)]-4,4,5,5-tetramethylimidazoline-1-oxyl- 3-oxide; hfac = hexafluoroacetylacetone] are characterized structurally and magnetically. The metal ions in the four complexes are all in six-coordinated environment with four oxygen atoms from two hfac ligands, and one radical oxygen atom and one triazole nitrogen atom from a two teeth 4-Me-3-Nit-trz ligand. The magnetic behaviors for 1-3 indicate that the metal ions and the direct coordinated radicals are antiferromagnetically coupled (J(Mn-rad) = -49.61 cm(-1), for 1; J(Co-rad) = -22.36 cm cm(-1), for 2; J(Ni-rad) = -115.39 cm(-1), for 3), whereas a ferromagnetic coupling between the Cu(II)ion and the nitroxide group (J(Cu-rad) = 3.45 cm(-1))is observed in 4.

• 出版日期2017-5-1
• 单位天津师范大学