compounds, especially 2, others viz. 1, 3 and 4 have been structurally characterized by X-ray crystallography. While FeII complexes, 1 and 2, are diamagnetic, the FeIII systems, namely the cations of 3, and 4 behave as low-spin (S = 1/2) paramagnetic species from 298 to 50 K. Below 50 K 3 shows gradual increase of χMT up to 2 K suggesting ferromagnetic behavior while 4 exhibits gradual decrease of magnetic
铁(II)和
铁(III)络合物,[FeII(DEDTC)2(dppe)]·
CH2Cl2(1),[FeII(ETXANT)2(dppe)](2)(DEDTC =
二乙基二
硫代
氨基甲酸酯,ETXANT =黄原酸
乙酯, dppe = 1,2-双(
二苯基膦基)
乙烷)和[FeIII(DEDTC)2(dppe)] [FeIIICl4](3)已经合成并表征。由于3包含两个磁性中心,因此进行了阴离子复分解反应,以产生非磁性的BPh4-离子产生[FeIII(DEDTC)2(dppe)] BPh4(4)代替四面体FeCl4-。阳离子3的磁性行为。从相似的角度来看,众所周知的FeCl4-离子(3的抗衡阴离子)被捕获为PPh4 [FeIIICl4](5),其298-2 K的磁性被研究了。除了适当化合物的光谱(红外,紫外-可见,NMR,EPR,质量和XPS)表征之外,尤其是2,其他人。通过X射线晶体学对1、3和4进行