铁(Ⅱ)-L配合物催化苯酚羟化反应机理的研究(英文)  

Mechanism of Phenol Hydroxylation Catalyzed by Iron(Ⅱ) L

作　　者：刘持标[1] 叶兴凯[1] 吴越[1] 

机构地区：[1]中国科学院长春应用化学研究所

出　　处：《分子催化》1997年第1期27-34,共8页Journal of Molecular Catalysis(China)

摘　　要：研究了铁（Ⅱ）－Ｌ（Ｌ＝Ｃ２Ｏ４２－、ＥＤＴＡ、ＣＮ－、Ｃ５Ｈ５－、１，１０－ｐｈｅｎａｎｔｈｒｏｌｉｎｅ和２，２′－ｄｉｐｙｒｉｄｉｎｅ）对苯酚羟化反应的催化作用．结果表明，催化剂的苯酚羟化活性与它们的氧化还原电位有关，电位过高和过低都不利于苯酚羟化反应的进行．本文同时提出了苯酚羟化的反应机理。Catalysis of iron(Ⅱ) L (L=C 2O 4 2- , EDTA, CN -, C 5H 5 -, 1,10 phenanthroline and 2,2′ dipyridine) was studied in homogeneous phenol hydroxylation. The results show that the activity of these catalysts is related to their redox potential, too low or too high redox potential is not favorable for its catalysis in phenol hydroxylation. With the help of UV Vis, ESR spectra and the catalysis of some catalysts in H 2O 2 decomposition, radical substitution mechanism of phenol hydroxylation with H 2O 2 as oxygen donor is proposed.

关 键 词：铁 配合物 苯酚 羟化 催化 络合物催化剂 

分 类 号：O621.251[理学—有机化学] O643.32[理学—化学]