Modeling the Syn Disposition of Nitrogen Donors at the Active Sites of Carboxylate-Bridged Diiron Enzymes. Enforcing Dinuclearity and Kinetic Stability with a 1,2-Diethynylbenzene-Based Ligand
作者:Jane Kuzelka、Joshua R. Farrell、Stephen J. Lippard
DOI:10.1021/ic034928e
日期:2003.12.1
diiron(II) complex [Fe(2)(micro-O(2)CAr(Tol))(2)(O(2)CAr(Tol))(2)(THF)(2)] (1), where Ar(Tol)CO(2)(-) is the sterically hindered carboxylate 2,6-di(p-tolyl)benzoate, served as a convenient starting material for the preparation of iron(II) complexes, all of which were crystallographically characterized. Use of the ligand 2,7-dimethyl-1,8-naphthyridine (Me(2)-napy) afforded the mononuclear complex [Fe(O(
在小分子模型化合物中,很难重现几种富含羧酸盐的非血红素二铁酶的活性位点处的组氨酸残基的同位配位。在这项研究中,衍生自1,8-萘啶,酞嗪和1,2-二乙炔基苯的配体被用来模拟这种几何特征。预组装的二价铁(II)配合物[Fe(2)(micro-O(2)CAr(Tol))(2)(O(2)CAr(Tol))(2)(THF)(2)](1) ,其中Ar(Tol)CO(2)(-)是位阻羧酸2,6-二(对甲苯基)苯甲酸酯,是制备铁(II)配合物的方便原料,所有这些都是晶体学表征。配体2,7-二甲基-1,8-萘啶(Me(2)-napy)的使用提供了单核络合物[Fe(O(2)CAr(Tol))(2)(Me(2)-napy) ](2),而双核[Fe(2)(micro-DMP)(micro-O(2)CAr(Tol))(2)(O(2)CAr(Tol))(2)(THF)](3)在1时产生使用了4-甲基邻苯二甲酸二嗪(D