Crystal Structures of Lanthanide(III) Complexes with Cyclen Derivative Bearing Three Acetate and One Methylphosphonate Pendants
作者:Pavel Vojtíšek、Petr Cígler、Jan Kotek、Jakub Rudovský、Petr Hermann、Ivan Lukeš
DOI:10.1021/ic048190s
日期:2005.8.1
coordinated to a lanthanide(III) ion similarly to the other H(4)dota-like ligands, i.e., forming O(4) and N(4) planes that are parallel and have mutual angle smaller than 3 degrees . The lanthanide(III) ions lie between these planes, closer to the O(4) base than to the N(4) plane. All of the structures present the lanthanide(III) complexes in their twisted-square-antiprismatic (TSA) configuration. Twist angles
一系列镧系元素(III)配合物,配制成M [Ln(Hdo3ap)]。xH(2)O(M = Li或H且Ln = Tb,Dy,Er,Lu和Y)与H( 4)dota固态制备1,4,7,10-四氮杂环十二烷-1,4,7-三乙酸-10-甲基膦酸(H(5)do3ap),并使用X射线晶体学研究。所有的结构都表明(Hdo3ap)(4-)阴离子与其他H(4)dota状配体相似,是八齿配位的镧系元素(III)离子,即形成O(4)和N(4)平行且相互夹角小于3度的平面。镧系元素(III)离子位于这些平面之间,比靠近N(4)平面更靠近O(4)碱。所有结构均以其扭曲方解棱角(TSA)构型呈现镧系(III)配合物。吊坠的扭曲角度在-24至-30度之间变化,对于每种复合物,它们都位于1度的非常狭窄的区域中。配位的膦酸酯氧位于由配位的乙酸酯形成的O(3)平面的稍上方(0.02-0.19埃)。发现水分子仅在b(III)和钕