Synthesis and Comparative η<sup>1</sup>-Alkyl and Sterically Induced Reduction Reactivity of (C<sub>5</sub>Me<sub>5</sub>)<sub>3</sub>Ln Complexes of La, Ce, Pr, Nd, and Sm
作者:William J. Evans、Jeremy M. Perotti、Stosh A. Kozimor、Timothy M. Champagne、Benjamin L. Davis、Gregory W. Nyce、Cy H. Fujimoto、Robert D. Clark、Matthew A. Johnston、Joseph W. Ziller
DOI:10.1021/om050402l
日期:2005.8.1
previously described Ce or Pr complexes containing the (C5Me5)- ligand. The η1-C5Me5 alkyl-like reactivity of the (C5Me5)3Ln complexes was investigated with CO, ethylene, THF, and H2. The sterically induced reduction (SIR) reactivity of the (C5Me5)3Ln complexes was examined with SePPh3, AgBPh4, C8H8, and phenazine. All of these data indicate that (C5Me5)3Ln reactivity increases with decreasing size
的合成(C 5我5)3 Ce和(C 5我5)3镨从[(C 5我5)2 LN] [(μ-PH)2 BPH 2 ]和KC 5我5完成该系列的较大的镧系元素La-Nd和Sm在空间上拥挤(C 5 Me 5)3 Ln络合物,并且可以比较结构和反应性随金属尺寸的变化。这些新的(C 5 Me 5)3的合成Ln配合物需要甲硅烷基化的玻璃器皿,这在空间上更拥挤的类似物上是不必要的。(C 5 Me 5)3 Ce和(C 5 Me 5)3 Pr显示比任何先前描述的包含(C 5 Me 5)-配体的Ce或Pr配合物更长的Ln-C(C 5 Me 5)距离。在η 1 -C 5我5烷基,如(C反应性5我5)3成LN络合物用CO,乙烯,THF,和H调查2。用Se PPh 3,AgBPh 4,C 8 H 8和吩嗪检查(C 5 Me 5)3 Ln复合物的空间诱导还原(SIR)反应性。所有这些数据表明,(C 5 Me 5)3 Ln
Organometallic Compounds of the Lanthanides. 156.<sup>1</sup> ω-Alkenyl-Functionalized Cyclopentadienyl Complexes of Yttrium, Samarium, Ytterbium, and Lutetium
作者:Herbert Schumann、Alexander Heim、Jörg Demtschuk、Stefan H. Mühle
DOI:10.1021/om020138l
日期:2002.8.1
YCl3, SmCl3, LuCl3, and YbI2 react with the lithium, sodium, and potassium salts of 1-(but-3-enyl)-2,3,4,5-tetramethylcyclopentadiene, yielding [(CH2CHCH2CH2C5Me4)2LnCl]2 (Ln = Y (3a), Sm (3b), Lu (3c)) and (CH2CHCH2CH2C5Me4)2Yb (6), respectively. The monomeric THF adducts (CH2CHCH2CH2C5Me4)2LnCl(THF) (Ln = Y (2a), Sm (2b)) crystallize from hexane. Li[C5Me4CH2CH2CH2CHCH2] reacts with SmCl3, yielding
YCl 3,SmCl 3,LuCl 3和YbI 2与1-(but-3-enyl)-2,3,4,5-tetramethylcyclopentadieneene的锂盐,钠盐和钾盐反应,生成[(CH 2 CHCH 2 CH 2 C 5 Me 4)2 LnCl] 2分别为(Ln = Y(3a),Sm(3b),Lu(3c))和(CH 2 CHCH 2 CH 2 C 5 Me 4)2 Yb(6)。单体THF加合物(CH 2CHCH 2 CH 2 C 5 Me 4)2 LnCl(THF)(Ln = Y(2a),Sm(2b))从己烷中结晶。Li [C 5 Me 4 CH 2 CH 2 CH 2 CH CH 2 ]与SmCl 3反应,得到(CH 2 CHCH 2 CH 2 CH 2 C 5 Me 4)2 SmCl(THF)(5b)。YCl 3,SmCl 3和LuCl的反应3具有1当量的M [C 5 Me 4
Organometallic compounds of the lanthanide—XL. Recent developments in organolanthanide chemistry
[K(DME)3][K((C5Me5Yb)3Cl8K(DME)2)2]. Compounds of the type Cp2Ln(μ-CH3)2LiL2 and [Li(TMED)2][CpLn(CH3)3] are useful starting materials for the synthesis of new organolanthanide derivatives with bonds between the lanthanides and other elements. By their reactions with tBuSH, PhSeH, Ph2Ph, and Ph2AsH, e.g. the new organolutetium compounds (C5Me5)2Lu(μ-StBu)2Li(THF)2, (C5H5)2Lu(μ-SePh)2Li(THF)2, (C5H5)2Lu
三氯化镧LnCl 3与五甲基环戊二烯基碱金属衍生物反应,形成C 5 Me 5 LnCl 3 ML n类型的新型化合物(M =碱金属,L =供体溶剂,如Et 2 O,THF,DME)。X射线结构研究表明,YbCl 3与KC 5 Me 5在THF和DME中反应,形成[K(DME)3 ] [K((C 5 Me 5 Yb)3 Cl 8 K(DME)2)2 ]。 。类型Cp的化合物2 LN(μ-CH 3)2 LiL 2和[Li(TMED)2 ] [CpLn(CH 3)3 ]是有用的起始原料,用于合成具有镧系元素和其他元素之间的键的新的有机镧系元素衍生物。通过它们与反应吨衬套,PhSeH中,Ph 2 PH,且Ph 2灰,例如新organolutetium化合物(C 5我5)2路(μ-S吨丁基)2的Li(THF)2,(C 5 H ^ 5)2 Lu(μ-SePh)2 Li(THF)2,(C 5ħ 5)2路(μ-PPH
Synthetic and reactivity studies of mono- and dicyclopentadienyl titanium, zirconium and hafnium complexes with the chlorodimethylsilyl-cyclopentadienyl ligand. X-ray molecular structure of Hf{(η5-C5H4)SiMe2OSiMe2(η5-C5H4)}Cl2 and Zr(η5-1,3-tBu2C5H3)(η5-C5H4SiMe2-η-NtBu)Cl
Reaction of the disilylated cyclopentadiene C5H4(SiClMe2)(SiMe3) with HfCl4, in heptane, gave the monocyclopentadienyl complex Hf(η5-C5H4SiClMe2)Cl3 (1c). Addition of two equivalents of C5H5(SiClMe2) to a solution of MCl4, in toluene under reflux and in the presence of two equivalents of NEt3, afforded the dichloro derivatives M(η5-C5H4SiClMe2)2Cl2 [M=Ti (2a), Hf (2c)]. Compounds 2a and 2c react with a
Bis(hydroxylaminato)-mono(pentamethylcyclopentadienyl) rare-earth metal complexes
作者:Ajay Venugopal、Tania Pape、Alexander Willner、Norbert W. Mitzel
DOI:10.1039/b904538d
日期:——
Salt
metathesis reactions involving the anhydrous rare-earth metal trichlorides MCl3 (M = Y, Ho, Er and Lu) and the N,N-diethylhydroxylaminato potassium salt, KONEt2 (1), and KC5Me5 result in formation of rare-earth metal hydroxylaminato complexes of the type [(C5Me5)M(μ-η1:η2-ONEt2)(η2-ONEt2)]2 (M = Y (2a), Ho (2b), Er (2c) and Lu (2d)). Compound 1 was characterised by elemental analysis, compounds 2a and 2d by NMR spectroscopy and compounds 2a–d by elemental analyses, mass-spectrometry and single crystal X-ray diffraction. Compounds 2a–d are isostructural in the solid state. Effective saturation of the coordination sphere of the rare-earth metal atoms by the hydroxylaminato groups is achieved by the formation of three-membered MON rings.
无水稀土金属三氯化物MCl3(M= Y、Ho、Er和Lu)与N,N-二乙基羟胺酸钾盐KONEt2(1)和KC5Me5的复分解反应,形成了类型为[(C5Me5)M(μ-η1:η2-ONEt2)(η2-ONEt2)]2(M= Y (2a), Ho (2b), Er (2c)和Lu (2d))的稀土金属羟胺酸配合物。化合物1通过元素分析表征,化合物2a和2d通过核磁共振光谱表征,化合物2a至2d通过元素分析、质谱和单晶X射线衍射表征。化合物2a至2d在固态下是等结构的。通过形成三元MON环,羟胺酸基团有效地饱和了稀土金属原子的配位环境。