The coordination chemistry of 1,2,4-triazinyl bipyridines with lanthanide(iii) elements – implications for the partitioning of americium(iii)
作者:Michael J. Hudson、Michael G. B. Drew、Mark R. StJ. Foreman、Clément Hill、Nathalie Huet、Charles Madic、Tristan G. A. Youngs
DOI:10.1039/b301178j
日期:2003.4.17
hemi-BTP when dissolved in TPH—a dodecane-like solvent—is a selective reagent for the separation of americium(III) from europium(III). Solution NMR in acetonitrile largely confirmed the crystallographic results. There was no evidence for a 1 ∶ 3 complex cation, or for significant differences between metal(III)–N distances for the pyridine and 1,2,4-triazine rings. Intramolecular hydrogen bonding plays a
已经确定6-(5,6-二烷基-1,2,4-三嗪-3-基)-2,2'-联吡啶(R,半-BTP)具有介于两者之间的中间性质。特吡啶和双(1,2,4-triazin-3-yl)吡啶(BTP)。但是,它们类似于特吡啶比BTP更紧密。已经显示,当溶解于TPH中时,Et,半BTP就像十二烷一样溶剂-是从from(III)中分离meric(III)的选择性试剂。溶液核磁共振 在 乙腈很大程度上证实了晶体学结果。没有证据表明存在1:3的复合物阳离子或用于金属之间(显著差异III)-N距离为吡啶类和1,2,4-三嗪环。分子内氢键在金属配位球的形成中起着至关重要的作用,这解释了叔吡啶基,R,半BTP和BTP之间的差异。R,半-BTPs的质子化促进构象变化,这是络合所必需的。