Formation of fulvene in the reaction of C2H with 1,3-butadiene
作者:Jessica F. Lockyear、Martin Fournier、Ian R. Sims、Jean-Claude Guillemin、Craig A. Taatjes、David L. Osborn、Stephen R. Leone
DOI:10.1016/j.ijms.2014.08.025
日期:2015.2
with 1,3-butadiene at 4 Torr and 298 K are probed using photoionization time-of-flight mass spectrometry. The reaction takes place in a slow-flow reactor, and products are ionized by tunable vacuum-ultraviolet light from the Advanced Light Source. The principal reaction channel involves addition of the radical to one of the unsaturated sites of 1,3-butadiene, followed by H-loss to give isomers of C
摘要 使用光电离飞行时间质谱法探测 C 2 H 自由基与 1,3-丁二烯在 4 Torr 和 298 K 反应中形成的产物。反应在慢流反应器中进行,产物被高级光源发出的可调真空紫外光电离。主要的反应通道包括将自由基加成到 1,3-丁二烯的不饱和位点之一,然后失去 H,得到 C 6 H 6 的异构体。C 6 H 6 产物的光电离谱表明形成了支化分数为(57±30)%的富烯。形成至少一种或多种异构体,其可能是 3,4-二亚甲基环丁-1-烯、3-亚甲基-1-戊烯-4-炔或 3-甲基-1,2-戊二烯-4 中的一种或多种-恩。实验光电离谱为 3,4-二亚甲基环丁-1-烯和3-亚甲基-1-戊烯-4-炔和3-甲基-1,2-戊二烯-4-炔的模拟光电离谱用于拟合测量数据并获得最大支化分数这些异构体分别为 74%、24% 和 31%。苯和 1,3-己二烯-5-炔的总和的支化分数的上限为 45%。还通过计算研究了反应势能表面。计算了生成富烯
Fulven-Dimere: Synthese, Strukturbeweis and thermisches Verhalten
Fulvene-Dieters: Synthesis, Structure Elucidation and Thermal Behaviour
富勒烯-二聚物:合成,结构解析和热行为
Click-enabled heterotrifunctional template for sequential bioconjugations
作者:David M. Beal、Victoria E. Albrow、George Burslem、Louisa Hitchen、Carla Fernandes、Cris Lapthorn、Lee R. Roberts、Matthew D. Selby、Lyn H. Jones
DOI:10.1039/c1ob06398g
日期:——
A heterotrifunctional template was developed that utilizes thiol–maleimide and click chemistries (both copper-free and copper-mediated) to effect sequential biomolecule conjugations in a one-pot process. The breadth of compatible substrates was illustrated through highly efficient conjugations of protein, peptide, sugar, lipid, fluoroalkane, biotin and fluorophore molecules. This template should be useful for the creation of chemically-enhanced/enabled biotherapeutics, especially through the expression of discontinuous (and heterogeneous) epitopes.
1-Acylated fulvenes were the only monoketones formed by treatment of fulvenes with methyl iodide, carbon monoxide, catalytic quantities of benzyltriethylammonium chloride and dicobalt octacarbonyl, in a two-phase system [5N NaOH/C6H6].
1-酰化的富烯是在两相系统[5N NaOH / C 6 H 6 ]中用碘代甲烷,一氧化碳,催化量的苄基三乙基氯化铵和二钴二羰基八羰基化合物处理富烯而形成的唯一单酮。
Shock Tube Study of Thermal Rearrangement of 1,5-Hexadiyne over Wide Temperature and Pressure Regime
作者:Robert S. Tranter、Weiyong Tang、Ken B. Anderson、Kenneth Brezinsky
DOI:10.1021/jp037310z
日期:2004.4.1
The pyrolysis of 1,5-hexadiyne has been studied in a high-pressure single pulse shock tube to investigate the mechanisms involved in the production of benzene from propargyl radicals. Analysis of the reaction products by gas chromatography and matrix isolation Fourier transform infrared spectroscopy has positively identified six linear C6H6 species and two cyclic C6H6 species. Of these species cis-1