Mono- vs. bi-metallic assembly on a bulky bis(imino)terpyridine framework: a combined experimental and theoretical study
作者:Yohan D. M. Champouret、Jean-Didier Maréchal、Ishaq Dadhiwala、John Fawcett、Donna Palmer、Kuldip Singh、Gregory A. Solan
DOI:10.1039/b516083a
日期:——
ligands, 6,6''-(2,6-i-Pr2C6H3)N=CR}2-2,2':6',2''-C15H9N3 (R = H L1, Me L2), have been prepared in high yield from the condensation reaction of the corresponding carbonyl compound with two equivalents of 2,6-diisopropylaniline. The molecular structure of L2 reveals a transoid relationship between the imino and pyridyl nitrogen groups throughout the ligand framework. Treatment of aldimine-containing L1 with
双(亚氨基)三联吡啶配体,6,6''-(2,6-i-Pr2C6H3)N = CR} 2-2,2':6',2''-C15H9N3(R = H L1,Me通过相应的羰基化合物与两个当量的2,6-二异丙基苯胺的缩合反应,可以高收率制备L2)。L2的分子结构揭示了整个配体框架中亚氨基和吡啶基氮基团之间的反式关系。在110摄氏度下,在n-BuOH中用一当量或过量的MX2处理含醛亚胺的L1,得到单核五配位络合物[(L1)MX2](M = Fe,X = Cl 1a; M = Ni, X = Br 1b; M = Zn,X = Cl 1c),其中金属中心占据了联吡啶的腔并且亚氨基基团是侧基。相反,含酮亚胺的L2与过量的MX2在正丁醇中于110摄氏度反应,得到双核络合物,[(L2)M2X4](M = Fe,X = Cl 3a; M = Ni,X = Br 3b; M = Zn,X = Cl 3c),其中一