[EN] SYNTHESIS OF ALKYL CYCLOPENTADIENE COMPOUNDS<br/>[FR] SYNTHÈSE DE COMPOSÉS ALKYL CYCLOPENTADIÈNES
申请人:UNIVATION TECH LLC
公开号:WO2011136902A1
公开(公告)日:2011-11-03
A method of synthesizing an alkyl cyclopentadiene compound is disclosed. The method includes contacting at least one cyclopentadienyl anion source and at least one alkyl group source to form at least one alkyl cyclopentadiene compound. The method further includes extracting the alkyl cyclopentadiene compound with a hydrocarbon solvent. The alkyl cyclopentadiene compound may be converted to a metallocene catalyst compound.
Impacts of Solvent and Alkyl Chain Length on the Lifetime of Singlet Cyclopentane-1,3-diyl Diradicaloids with π-Single Bonding
作者:Qian Liu、Zhe Wang、Manabu Abe
DOI:10.1021/acs.joc.1c02895
日期:2022.2.4
dependent on π*. Slower isomerization was observed in more polar solvents. In high-η solvents (η > 2 mPa s), the rate of isomerization was largely influenced by η in addition to π*. Slower isomerization was observed in more viscous solvents. Experimental results demonstrated the crucial roles of both solventpolarity and viscosity in the reactivity of singlet diradicaloids and thus clarified the characters
单线态2,2-二烷氧基环戊烷-1,3-二基双自由基不仅是键均裂过程中的重要关键中间体,而且作为π-单键化合物也备受关注。在本研究中,溶剂粘度 η (0.24–125.4 mPa s) 和极性 π*(-0.11 至 1.00 kcal mol –1) 使用 18 种不同的溶剂(包括含有离子液体的二元混合溶剂系统)彻底研究了局部单线态双自由基的反应性。在低 η 溶剂(η < 1 mPa s)中,单线态双自由基的寿命(由 π-单键单线双自由基异构化为 σ-键异构体的速率常数决定)基本上取决于 π* . 在极性更大的溶剂中观察到较慢的异构化。在高 η 溶剂(η > 2 mPa s)中,除了 π* 之外,异构化速率还很大程度上受 η 的影响。在更粘稠的溶剂中观察到较慢的异构化。实验结果证明了溶剂极性和粘度在单线态双自由基反应中的关键作用,从而阐明了单线态双自由基的化学转化特征和分子运动。动态溶剂效应