Structural diversity in manganese, iron and cobalt complexes of the ditopic 1,2-bis(2,2′-bipyridyl-6-yl)ethyne ligand and observation of epoxidation and catalase activity of manganese compounds
作者:Vedichi Madhu、Balaraman Ekambaram、Linda J. W. Shimon、Yael Diskin、Gregory Leitus、Ronny Neumann
DOI:10.1039/b925129d
日期:——
2′-bipyridyl-6-yl)ethyne ligand, L, has been synthesized for the first time by consecutive Suzuki and Sonogashira coupling reactions either in a one- or two-step synthesis. Coordination of L with some first-row transition metals, Fe, Mn and Co showed a very rich structural diversity that can be obtained with this ligand. Reaction of L with MnII(OAc)2 yielded a dimanganese(II) complex, [Mn2L(μ-OAc)3]PF6
对位 1,2-双(2,2'-联吡啶基-6-基)乙炔通过连续的Suzuki和Sonogashira偶联反应,以一步或两步合成方法首次合成了配体L。的协调大号与一些第一行过渡金属,铁, 锰 和 有限公司显示出可以用该配体获得的非常丰富的结构多样性。反应大号带锰II(OAc)2生成二锰(II)配合物[Mn 2 L(μ-OAc)3 ] PF 6,(1)其中两个稍不等价的三角双锥体锰被3.381Å隔开的原子被L和三个桥连醋酸盐部分。的类似的反应大号带锰III(OAc)3 产生了很大的不同 二锰络合物[Mn 2 L '(OH)(OAc)2(DMF)2 ] PF 6 ·DMF(2)其中L ′是原位形成的E -1,2-双(2,2'-联吡啶基-6-基)乙烯片段。这L ′ 两者之间的配体桥 锰中心,尽管其反式配置,这导致非常紧张乙烯桥接部分。这锰 原子也被两个桥接 醋酸盐 配体和在Mn原子与乙烯片段之间架桥的羟基;