situ-prepared Li2COT′′ in either DME (=1,2-dimethoxyethane) or THF. The neutral actinide sandwich complexes An(COT′′)2 (An = Th (9), U (10)) and An(COT′′′)2 (COT′′′ = 1,3,6-tris(trimethylsilyl)cyclooctatetraenyl dianion; An = Th (11), U (12)) were synthesized in a similar manner, starting from ThCl4 or UCl4, respectively. The COT′′ ligand imparts excellent solubility even in low-polar solvents as well as
[Ln(COT'')2 ] -(COT''= 1,4-双(三甲基甲
硅烷基)环
辛酸酯四烯基二烯基阴离子)类型的阴离子
镧系元素(III)三明治配合物系列已大大扩展从
镧到。新化合物[Li(
DME)3 ] [Ln(COT'')2 ](Ln = Y(1),La(2),Pr(3),Gd(4),Tm(6),Lu(8))和[Li(THF)4 ] [Ln(COT'')2 ](Ln = Ho(5),Tm(7))是按照简单的合成规程以高收率制备的,该规程涉及用2当量的LnCl 3处理。的原位-prepared栗2中任一
DME(= 1,2-
二甲氧基乙烷)或THF COT''。中性act系元素夹心复合物An(COT'')2(An = Th(9),U(10))和An(COT''')2(COT'''= 1,3,6-tris(trimethylsilyl)环辛四烯二价阴离子;安=
钍(11),U(12))以类似的方式合成,从ThCl开始4或UCL