iron complex is unusually unstable. A thermal decomposition product is isolated wherein the coordinated pyDTDA ligand appears to have been transformed into a coordinated 2-(2'-pyridyl)-4,6-bis(trifluoromethyl)pyrimidine. The iron complex also yields a solution decomposition product in the presence of air that is best described as an oxygen bridged iron(III) tetramer with two hfac ligands on each of three
Ni(hfac)2(pyDT
DA)和Fe(hfac)2(pyDT
DA)配合物的合成,结构,磁性和电
化学特性均有报道(hfac = 1,1,1,5,5,5,5-
六氟乙酰丙酮-; pyDT
DA = 4-(2′-
吡啶基)-1,2,3,5-二
噻二唑基)。与先前报道的Mn(II)和Cu(II)配合物不同,但与Co(II)配合物相似,Ni(II)和Fe(II)配合物在固态下不二聚化,从而允许它们之间的磁耦合。
金属离子和顺磁性
配体很容易从固态磁测量中获得:Ni络合物,J / k B = +132(1)K,使用H = -2 J S Ni。S Rad}和g Ni = 2.04(2)和g Rad = 1.99(2);
铁络合物,J / k B = -60.3(3)K,使用H = -2 J S Fe。S Rad}和g av = 2.11(2)。
铁络合物异常不稳定。分离出热分解产物,其中配位的pyDT
DA配体似