Zinc(II)–phenoxyl radical complexes: Dependence on complexation properties of Zn–phenolate species
作者:Yuichi Shimazaki、Tatsuo Yajima、Tadashi Shiraiwa、Osamu Yamauchi
DOI:10.1016/j.ica.2008.11.006
日期:2009.5
converted to the phenoxyl radicals upon oxidation with Ce(IV), giving a phenoxyl radical π–π∗ transition band at 394–407 nm. ESR and resonance Raman spectra established that the radical species had a Zn(II)–phenoxyl radical bond. The cyclic voltammograms showed similar quasi-reversible redox waves with E1/2 = 0.68, 0.67, and 0.63 V (versus Ag/AgCl) for 1, 2, and 3, respectively, corresponding to the formation
摘要N3O供体三脚形配体,2,4-二(叔丁基)-6-[双(2-吡啶基)甲基]氨基甲基}苯酚(HtbuL),2,4-二(叔)的锌(II)配合物-丁基)-6-[((6-甲基-2-吡啶基)甲基]-(2-吡啶基)甲基氨基甲基}苯酚(HtbuLMepy)和2,4-二(叔丁基)-6-[bis( 6-甲基-2-吡啶基)甲基]氨基甲基}苯酚(HtbuL(Mepy)2),[Zn(tbuL)Cl]·CH3OH(1),[Zn(tbuLMepy)Cl](2)和[Zn(tbuL)分别制备了(Mepy)2)Cl](3),并通过X射线衍射法对其结构进行了表征。发现所有复合物均具有带有配位酚盐部分的单核结构,Zn(II)中心的几何形状为5配位三角双锥体。对于类似的配体,评估了有或没有6-甲基-2-吡啶基甲基部分的配体对Zn(II)的结合能力,通过在25°C(I = 0.1 M(KNO3))电位滴定确定的稳定性常数,