Coordination “Oligomers” in Self-Assembly Reactions of Some “Tritopic” Picolinic Dihydrazone LigandsMononuclear, Dinuclear, Hexanuclear, Heptanuclear, and Nonanuclear Examples
作者:Virginie Niel、Victoria A. Milway、Louise N. Dawe、Hilde Grove、Santokh S. Tandon、Tareque S. M. Abedin、Timothy L. Kelly、Elinor C. Spencer、Judith A. K. Howard、Julie L. Collins、David O. Miller、Laurence K. Thompson
DOI:10.1021/ic7016787
日期:2008.1.1
interaction and the conformationally flexible nature of the ligands and points to the possible involvement of some of these species as intermediates in the [3 x 3] grid formation process. Examples of mononuclear, dinuclear, hexanuclear, heptanuclear, and nonanuclear species involving Fe(II), Co(II), Ni(II), and Cu(II) salts with a series of potentially heptadentate picolinic dihydrazone ligands with
具有三齿配位口袋的“三位”吡啶甲酸二hydr配体被设计为在与过渡金属盐反应时产生均相的[3 x 3]非核方格网配合物,并且已经获得了许多结构记录的实例,其中含有Mn(II),Cu(II)和Zn(II)离子。但是,还发现了具有较小核数的其他寡聚络合物,并在某些反应中从结构上进行了鉴定,这些反应涉及具有某些三位配体的Fe(II),Co(II),Ni(II)和Cu(II)。这说明了金属-配体相互作用的动力学性质和配体的构象柔性性质,并指出了其中某些物质可能作为中间体参与[3 x 3]网格形成过程。单核,双核,六核,七核,本研究描述了非铁原子和涉及Fe(II),Co(II),Ni(II)和Cu(II)盐以及一系列潜在的七齿的吡啶甲酸二hydr配体与吡嗪,嘧啶和吡啶端基的非核物种。铁和钴的络合反应由于氧化还原过程而变得复杂,当从Co(II)盐开始时会导致混合氧化态的Co(II)/ Co(III)系统