Preparation and Reactions of Base-Free Bis(1,2,4-tri-<i>tert</i>-butylcyclopentadienyl)uranium Oxide, Cp‘<sub>2</sub>UO
作者:Guofu Zi、Li Jia、Evan L. Werkema、Marc D. Walter、Jochen P. Gottfriedsen、Richard A. Andersen
DOI:10.1021/om050406q
日期:2005.8.1
Reduction of the uranium metallocene [η5-1,2,4-(Me3C)3C5H2]2UCl2 (1), Cp‘2UCl2, in the presence of 2,2‘-bipyridyl and sodium naphthalene gives the dark green metallocene complex Cp‘2U(bipy) (6), which reacts with p-tolyl azide or pyridine-N-oxide to give Cp‘2UN(p-tolyl) (7) or Cp‘2U(O)(py) (8), respectively. The Lewis acid BPh3 precipitates Ph3B(py) and gives the base-free oxo Cp‘2UO (10), which crystallizes
铀金属茂的还原[ η 5 -1,2,4-(ME 3 C)3 c ^ 5 ħ 2 ] 2 UCL 2(1)中,Cp” 2 UCL 2,在2,2'-联吡啶的存在下和钠萘给出了深绿色金属茂配合物的Cp ' 2 U(联吡啶)(6),其与发生反应p -甲苯基叠氮化物或吡啶ñ氧化物,得到的Cp' 2 ù N(p -甲苯基)(7)或CP” 2 U(O)(py)(8), 分别。路易斯酸BPH 3个沉淀博士3 B(PY),并给出了游离碱氧代的Cp” 2 UO(10),其从戊烷中结晶。所述oxometallocene 10表现为与我的亲核试剂3的SiX试剂,但它不表现出与乙炔环加成行为,这表明极性共振结构的Cp“ 2 Ü + -O -占主导地位的双键的共振结构的Cp” 2 ù O.