Organometallic compounds of the lanthanides. CXXIII. Lanthanide bent-sandwich complexes with the bulky tetramethyl-iso-propylcyclopentadienyl ligand—synthesis, structures and catalytic activity for the hydrosilylation of alkenes/alkynes
作者:Herbert Schumann、Markus R. Keitsch、Jörn Winterfeld、Stefan Mühle、Gary A. Molander
DOI:10.1016/s0022-328x(98)00410-0
日期:1998.5
[(η5-C5Me4 iPr)2Ln(THF)] (Ln=Sm (8), Yb (9)). The new compounds with the bulky tetramethyl-iso-propylcyclopentadienyl ligands were characterized by C, H analysis, mass spectrometry and NMR spectroscopy. Additionally, single crystal X-ray structure determination of the lutetium complexes 3 and 5 was performed. It has been shown that the alkyl complexes 4–7 are effective precatalysts for the hydrosilylation
钇,钐和镥的三氯化物用Na两个当量反应[C 5我4 我镨]在THF中的形式[(η 5 -C 5我4 我PR)2 LnCl(THF)](Ln为Y(1),Sm(2),Lu(3))。的复分解1 - 3与的LiCH 3在乙醚和的LiCH(森达3)2在甲苯中给出[(η 5 -C 5我4 我PR)2 LnCH 3(THF)](Ln为Y(4),路(5))和[(η 5 -C 5我4 我PR)2 LN CH(森达3)2 }](Ln为Y(6),钐(7分别地)),。1:LNI 2反应2(THF)X(LN = SM,Yb)的用Na [C 5我4 我镨]在二价金属茂的形成THF结果[(η 5 -C 5我4 我镨)2 Ln(THF)](Ln = Sm(8),Yb(9))。与四甲基笨重的新化合物异由C,H分析,质谱和NMR光谱-propylcyclopentadienyl配体进行了表征。另外,进行the络合物3和5的