Structure and characterization of a μ-phenoxo-bis μ-acetato dinuclear Mn(II,II) complex [Mn2(LO)(μ-OAc)2](ClO4) (LOH=2,6-bis{bis(2-(2-pyridyl)ethyl)aminomethyl}-4-methylphenol): Substituent effects
作者:Yilma Gultneh、Yohannes T. Tesema、Bijan Ahvazi、Teshome B. Yisgedu、Ray J. Butcher、J.-P. Tuchagues
DOI:10.1016/j.ica.2006.05.040
日期:2006.11
at E1/2 = 0.65 V, for the Mn2(II,II)/Mn2(II,III) redox process, and an irreversible oxidation peak at Ep,c = 1.22 V versus Ag/AgCl for the Mn2(II,III) to Mn2(III,III) oxidation process. Controlled potential electrolysis of 1 in acetonitrile solution at 0.85 V (versus Ag/AgCl) takes up 1 F of charge per mole of 1 to yield a brown solution of the Mn2(II,III) state of the complex, which, however, is unstable
摘要双核Mn(II)配合物[Mn2(LO)(μ-OAc)2](ClO4)(1)的合成,结构与表征报道了)(乙基)氨基甲基)}-4-甲基苯酚。Mn(ClO4)2·6H2O在干燥的脱气甲醇中和氩气气氛下,在NEt3存在下,与成核配体LOH和H3CCOONa反应,得到1,为无色粉末。通过X射线衍射法确定的1的晶体结构显示了双核Mn(II)络合物,其中两个Mn(II)离子(分别处于六坐标近似八面体配位)被LO-和酚酸氧桥接。通过两个乙酸根离子以syn,syn-1,3-桥接方式 Mn–Mn距离为3.557(1)A,Mn–O酚盐–Mn角为112.50(9)°。乙腈溶液中1的循环伏安法在E1 / 2 = 0.65 V时显示出准可逆波,Mn2(II,II)/ Mn2(II,III)的氧化还原过程,在EP,c = 1.22 V处有不可逆的氧化峰,相对于Ag / AgCl,Mn2(II,III)转化为Mn2(III,III)过程。在0