Crystal structures and magnetic properties of metal complexes bearing four nitronyl nitroxide moieties in the same coordination sphere.

摘要: Mononuclear transition metal complexes of the type [M(2,6-NITpy)2](ClO4)2 × solvent (2,6-NITpy = 2,6-bis(3‘-oxide-1‘-oxyl-4‘,4‘,5‘,5‘-tetramethylimidazolin-2‘-yl)pyridine; M Ni (1), Co (2), Zn (3), Mn (4), Cu (5)) have been synthesized and characterized by single-crystal X-ray diffraction studies. Crystal data:  1, monoclinic, P21/c, Z 4, a 20.946(2) A, b 12.0633(2) c 21.173(2) β 113.55(1)°; 2, 20.902(2) 12.0981(8) 21.215(2) 113.130(9)°; 3, triclinic, P1, 11.410(1) 12.932(1) 21.609(2) α 96.040(2)°, 102.24(1)°, γ 114.98(1); P21/n, 11.5473(8) 19.212(1) 25.236(2) 98.772(9)°; 5, 12.1604(9) 12.6961(9) 18.103(2) 84.191(8)°, 73.392(8)°, 66.072(8). The two 2,6-NITpy biradicals behave as terdentate ligands bind almost perpendicular to each other in meridional positions. In compounds 1−4, pyridine ring...