Synthesis and magnetic properties of a new complex made up of Mn(hfac)(2) and a radical with a triplet ground state

摘要

A new metal-radical complex of Mn(II) made up of Mn(hfac)(2) and the radical 4-N-tert-butylaminoxyl-4'-(1-oxyl-3-oxide-4,4,5,5-tetramethylimidazolin-2- yl) biphenyl (BIPNNNO) was synthesized. The X-ray single crystal structural analysis revealed that the complex consists of discrete molecules [Mn(hfac)(2)] (BIPNNNO)(2). The magnetic characteristics of this complex were studied and the Mn-radical and intraradical exchange integrals were evaluated: -135 +/- 10 and 72 +/- 5 K, respectively. These values are compared with those of complexes of Mn(hfac)(2) with different aminoxyl polyradicals. [References: 14]