2,6-二乙酰吡啶类双希夫碱配合物的研究——Ⅰ.VO(Ⅱ)、Mn(Ⅱ)、Fe(Ⅱ)和Fe(Ⅲ)配合物的合成和表征

STUDIES ON COMPLEXES OF SCHIFF BASES DERIVED FROM 2,6-DIACETYLPYRIDINE Ⅰ.SYNTHESIS AND CHARACTERIZATION OF VO(Ⅱ),Mn(Ⅱ), Fe(Ⅱ) AND Fe(Ⅲ) COMPLEXES

制备了由2,6-二乙酰吡啶与肼基硫代甲酯衍生的希夫碱C_5H_3N[CH=NN=C(S)XR]_2(X=S,R=CH_3,C_6H_5CH_2;X=O,R=C_6H_5CH_2)。离析出类型为MC_5H_3N[CH=NN=C(S)XR]_2(M=VO^(2+)、Mn^(2+)和Fe^(2+))和FeC_5H_3N[CH=NN=C(S)SR]_2Cl的希夫碱配合物。希夫碱及其配合物为元素分析、红外、可见一紫外光谱以及磁化率测量所表征,结果与所提出的Mn^(2+)、Fe^(2+)及Fe^(3+)配合物的结构一致.在VO(Ⅱ)配合物的情况,则形成多聚体,其结构为: -(N_3S_2)V-O-V(N_3S_2)-O-V(N_3S_2)-.

The Schiff bases 2,6-C5H3N(CH = NN = C(S)XR)2(where X= S, R = CH3, C6H5CH2; and X = O,R = C6H5CH2) derived from 2,6-diacetylpyridine and dithiocarbazate have been prepared. Complexes of the Schiff bases of the type MC5H3N[CH = NN = C(S)XR]2(M = VO2+, Mn2+andFe2+) and FeC3H3NtCH = NN = C(S)SR]2C1 have been isolated. The Schiff bases and complexes were characterized by elemental analysis, infrared and visible-ultraviolet spectroscopy and magnetic susceptibility measurements. The results are consistent with the structures proposed for Mn2+, Fe2+and Fe3+complexes. In case of VO(Ⅱ) complexes, they form polymers whose structure is suggested as -(N3S2)V-O-V(N3S2)-O-V(N3S2)-