在六氯乙烷存在下用碱金属醇盐和硅氧化物处理 Cp* 2 CeCl 2 K(THF) 生成单体双(五甲基环戊二烯基)铈(IV)配合物 Cp* 2 Ce(OR) 2 (Cp* = C 5 Me 5;R = Et、i Pr、CH 2 t Bu、t Bu、SiMe 3或 SiPh 3 )。大的取代基 R 触发配体加扰到半夹心配合物 Cp*Ce(OR) 3,可以分离出 R = t Bu 和 SiPh 3。与芳氧基钠 NaOAr (OAr = OC 6H 3 i Pr 2 -2,6) 导致 Cp* 2 Ce(OAr)Cl。三(环戊二烯基)配合物Cp R 3 CeCl (Cp H = Cp = C 5 H 5;Cp Me = C 5 H 4 Me)用NaOAr处理得到Cp Me 2 Ce(OAr) 2和Cp 3 Ce(OAr)。铈 (IV) 配合物在固态下显示出假四面体几何形状。循环伏安法显示大部分化学
Facile Access to Tetravalent Cerium Compounds: One-Electron Oxidation Using Iodine(III) Reagents
摘要:
Readily accessible and easy-to-use phenyliodine(III) dichloride, PhICl2, has been established as an innovative and superior reagent for the one-electron oxidation of cerium(III) complexes, comprising amide, amidinate, and cyclopentadienyl derivatives. Its use allowed the successful synthesis and structural characterization of the first members of three new classes of chloro-functionalized (organo)cerium(IV) compounds, including the long sought-after Cp3CeCl.