Ln(CH 2 SiMe 3)3(THF)2(Ln = Y,Lu)与一当量的具有不同空间需求量的HL([CyC(N-2,6- i Pr 2 C 6 H 3)2 ] H(HL 1),[CyC(N-2,6-Me 2 C 6 H 3)2 ] H(HL 2),[PhC(N-2,6-Me 2 C 6 H 3)2 ] H(HL 3))在四氢呋喃中得到一系列单(ami基)稀土金属双(烷基)络合物[CyC(N-2,6- i Pr 2 C 6 H 3)2 ] Ln(CH 2 SiMe 3)2(THF) (Ln = Y(1),Lu(3)),[CyC(N-2,6-Me 2 C 6 H 3)2 ] Ln(CH 2 SiMe 3)2(THF)2(Ln = Y(4),Lu(6))和[PhC(N-2,6-Me 2 C 6 H 3)2] Y(CH 2 SiMe 3)2(THF)2(7)的分离产率为75-89%。对于早期的镧系金属Nd,将NdCl
i Pr 2 C 6 H 3 ( H 2 L 3 ), R 1 = C 6 H 10 , R 2 = 2,6-Me 2 C 6 H 3 ( H 2 L 4 )) were prepared in 65–78% isolated yields by the condensation reaction of dicarboxylic acid with four equimolar amounts of amines in the presence of PPSE (polyphosphoric acid trimethylsilyl ester) at 180 °C. Alkane elimination reaction of AlMe 3 with 0.5 equivalent of the bridged-amidines ( H 2 L ) in THF at room temperature
为了了解双金属配合物是否可以在聚合反应中显示协同作用,其相关的单核类似物L AlMe 2(L 5(5),L 6(6),L 7(7),L 8(8))也具有通过用1当量的HL([PhC(N-2,6- i Pr 2 C 6 H 3)2] H(HL 5),[PhC(N -2,6-Me 2 C 6 H 3)2] H(HL 6),[CyC(N-2,6- i Pr 2 C 6 H 3)2] H(HL 7),[CyC(N-室温下在THF中的2,6-Me 2 C 6 H 3)2] H(HL 8))。所有这些配合物均通过元素分析,FT-IR和NMR光谱进行了表征。通过X射线衍射确定H 2 L 3,1、3、5和7的晶体结构。在所有这些a基铝甲基络合物中,Al由来自二合ami酰胺配体的两个氮原子和两个甲基四配位,以采用扭曲的四面体几何形状。这些配合物在室温下对ε-己内酯的开环聚合具有活性,从而得到单峰分子量分布的聚酯。
Rare earth metal bis(amide) complexes bearing amidinate ancillary ligands: Synthesis, characterization, and performance as catalyst precursors for cis-1,4 selective polymerization of isoprene
afforded the neutral and unsolvated mono(amidinate) rareearthmetalbis(amide) complexes [RC(N-2,6-Me2C6H3)2]Y[N(SiMe3)2]2 (R = Cy (1); R = Ph (2)), and the “ate” mono(amidinate) rareearthmetalbis(amide) complex [CyC(N-2,6-Me2C6H3)2]Lu[N(SiMe3)2]2(μ-Cl)Li(THF)3 (3) in 61–72% isolated yields. These complexes were characterized by elemental analysis, NMR spectroscopy, FT-IR spectroscopy, and X-ray
带有bearing基单阴离子[酸盐[RC(N-2,6-Me 2 C 6 H 3)2 ] -(R =环己基(Cy),苯基(Ph))作为辅助配体的稀土金属双(酰胺)配合物家族为合成和表征。在引入两当量的NaN(SiMe 3)2后,无水LnCl 3与一当量的in酸锂[RC(N-2,6-Me 2 C 6 H 3)2 ] Li进行一锅盐易位反应。在室温下,四氢呋喃得到中性和未溶剂化的单(ami基)稀土金属双(酰胺)配合物[RC(N-2,6-Me 2 C6 H 3) 2 ] Y [N(SiMe 3) 2 ] 2(R = Cy( 1); R = Ph( 2))和“酸盐”单(ami酸盐)稀土金属双(酰胺)络合物[ CyC(N-2,6-Me 2 C 6 H 3) 2 ] Lu [N(SiMe 3) 2 ] 2(μ-Cl)Li(THF) 3( 3)的分离产率为61-72%。这些配合物通过元素分析,NMR光谱,
Stereo- and Regioselective Addition of Arene to Alkyne Using Abnormal NHC Based Palladium Catalysts: Elucidating the Role of Trifluoroacetic Acid in Fujiwara Process
作者:Pradip Kumar Hota、Anex Jose、Swadhin K. Mandal
DOI:10.1021/acs.organomet.7b00649
日期:2017.11.27
(aNHC) based Pd catalysts have been used for the efficient hydroarylation of aromatic C–H bonds leading to new C–C bond formation through regio- and stereoselective addition to alkynes. The addition reaction has been realized by a catalytic amount of Pd (II) compound (0.5 mol %) in trifluoroacetic acid (TFA) under ambient conditions. Various arenes undergo transhydroarylation selectively across the triple
Copper clusters built on bulky amidinate ligands: spin delocalization via superexchange rather than direct metal–metal bonding
作者:Xuan Jiang、John C. Bollinger、Mu-Hyun Baik、Dongwhan Lee
DOI:10.1039/b412152j
日期:——
Entry into a new class of tetra- and dicopper clusters was assisted by a fine steric tuning of bulky amidinate ligands that provide spin-delocalizing superexchange pathways in class III mixed-valence clusters, the properties of which are best understood without invoking metal-metalbonding.
Synthesis, characterization and l-lactide polymerization behavior of bis(amidinate) rare earth metal amide complexes
作者:Yunjie Luo、Ping Xu、Yinlin Lei、Yong Zhang、Yaorong Wang
DOI:10.1016/j.ica.2010.07.036
日期:2010.10
A family of neutral and solvent-free bis(amidinate) rareearthmetalamidecomplexes with a general formula [RC(N-2,6-Me 2 C 6 H 3 ) 2 ] 2 LnN(SiMe 3 ) 2 (R = phenyl (Ph), Ln = Y ( 1 ), Nd ( 2 ); R = cyclohexyl (Cy), Ln = Y ( 3 ), Nd ( 4 )) were synthesized in high yields by one-pot salt metathesis reaction of anhydrous LnCl 3 , amidinate lithium salt [RC(N-2,6-Me 2 C 6 H 3 ) 2 ]Li, and NaN(SiMe 3
通式[RC(N-2,6-Me 2 C 6 H 3)2] 2 LnN(SiMe 3)2(R =苯基)的中性和无溶剂双(ami基)稀土金属酰胺配合物家族(Ph),Ln = Y(1),Nd(2); R =环己基(Cy),Ln = Y(3),Nd(4))是通过无水LnCl的一锅盐复分解反应高收率合成的如图3所示,室温下在THF中的a酰胺锂盐[RC(N-2,6-Me 2 C 6 H 3)2] Li和NaN(SiMe 3)2。配合物1、2和4的单晶结构测定表明,中心金属采用了扭曲的锥体几何形状。在1当量的i Pr-OH存在下,所有这些配合物对于在70℃的甲苯中的l-丙交酯聚合反应均具有活性,从而得到高分子量(Mn≥104)的聚合物。