Complexes formed between the quadridentate, heterocyclic molecules 6,6′-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-2,2′-bipyridine (BTBP) and lanthanides(<scp>iii</scp>): implications for the partitioning of actinides(<scp>iii</scp>) and lanthanides(<scp>iii</scp>)
作者:Mark R. S. Foreman、Michael J. Hudson、Michael G. B. Drew、Clément Hill、Charles Madic
DOI:10.1039/b511321k
日期:——
nitrogen heterocyclic reagents, 6,6'-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-2,2'-bipyridines (BTBPs) have been synthesised. These reagents form complexes with lanthanides and crystal structures with 11 different lanthanides have been determined. The majority of the structures show the lanthanide to be 10-coordinate with stoichiometry [Ln(BTBP)(NO3)3] although Yb and Lu are 9-coordinate in complexes with
合成了新的疏水性四齿氮杂环试剂6,6'-双-(5,6-二烷基-1,2,4-三嗪-3-基)-2,2'-联吡啶(BTBP)。这些试剂与镧系元素形成络合物,并且已经确定了与11种不同镧系元素的晶体结构。大多数结构显示镧系元素与化学计量比[Ln(BTBP)(NO3)3]配比为10配位,尽管Yb和Lu在化学计量比为[Ln(BTBP)(NO3)2(H2O)]的配合物中为9配比。 (NO3)。在这些络合物中,BTBP配体为四齿状且呈平面状,且供体氮相互连接。顺式,顺式,顺式构象 还确定了两个自由分子,即C2-BTBP和CyMe4-BTBP的晶体结构,并显示了分别描述为顺式,反式,顺式和反式,反式,反式,反式的不同构象。硝酸镧和C5-BTBP之间的NMR滴定表明,在溶液中发现了两种不同的络合物,即[La(C5-BTBP)2] 3+和[La(C5-BTBP)(NO3)3]。溶解在辛醇中的BTBP能够以较大的分离系数从1