N&el 温度接近 140 K。随着 Ti-Ti 距离的减小,体磁性质从顺磁性突然变为反铁磁性,Ni 与载体的相互作用发生了变化;Ni/Ti7013 化学吸附的 H2 几乎是 Ni/Ti6OI1 的两倍。这是一个有趣的例子,说明体电子特性如何影响表面化学。总之,我们已经表明,在 295 K 时,H2 在分散在 Ti,02,1 上的 Ni 上的化学吸附随着 n 的减小而减小。此外,H2 化学吸附的变化不是 n 的平滑函数,但在 Ti7013 和 Ti6OI1 之间观察到大的下降,其中体积特性发生了很大的变化。这些发现与 Ni 与 TiO 反应形成亚稳态 Ni Ti 4 复合材料的模型一致。
Synthesis of Alkenyl Sulfides Through the Iron-Catalyzed Cross-Coupling Reaction of Vinyl Halides with Thiols
作者:Yun-Yung Lin、Yu-Jen Wang、Che-Hung Lin、Jun-Hao Cheng、Chin-Fa Lee
DOI:10.1021/jo3008397
日期:2012.7.20
here the iron-catalyzedcross-couplingreaction of alkyl vinyl halides with thiols. While many works are devoted to the coupling of thiols with alkyl vinyl iodides, interestingly, the known S-vinylation of vinylbromides and chlorides is limited to 1-(2-bromovinyl)benzene and 1-(2-chlorovinyl)benzene. Investigation on the coupling reaction of challenging alkyl vinylbromides and chlorides with thiols
Photochemistry of alkyl halides. 10. Vinyl halides and vinylidene dihalides
作者:Paul J. Kropp、Steven A. McNeely、Robert Drummond Davis
DOI:10.1021/ja00361a028
日期:1983.11
Proprietes photochimiques du dimethyl-2,4 iodo-3 pentene-2, des iodo-1 cycloalcenes, des (halogenomethylene) cycloalcanes et des (dihalogenomethylene) cyclohexanes. Formation de produits radicalaires et ioniques. Mecanismes. Donnees spectrales UV, IR, RMN 1 H
Proprietes photochimiques du dimethyl-2,4 iodo-3 pentene-2, des iodo-1 cycloalcenes, des (halogenomethylene) cycloalcanes et des (dihalogenomethylene) cyclohexes。形成 de produits 激进分子和 ioniques。机制。Donnees 光谱 UV、IR、RMN 1 H
Photochemistry of organic halides: Some interesting features of the photobehaviour of vinyl halides and vinylidine dihalides derived from camphene
作者:H.R. Sonawane、B.S. Nanjundiah、M.D. Panse
DOI:10.1016/s0040-4039(00)98676-3
日期:1985.1
A study of the photochemistry of vinylidine dihalides 1 and 2 and vinylhalides 4 and 5 revealed some interesting differences in their photobehaviour. This study led to uncover an important constraint in the generation of vinyl cations from certain α-unsubstituted vinyl halides such as 4.
The synthesis of enynes from the coupling of terminal alkynes with alkenyl iodides and bromides is described. This system employs 1.0-5.0 mol% of CuI(Xantphos) as a catalyst. A variety of alkenyl iodides and bromides are coupled smoothly with terminal alkynes, affording enynes in good to excellent yields.
A copper-catalyzed cross-coupling reaction of alkynes with aryl iodides is described. The system tolerates a broad range of functional groups and enables the sterically demanding substrates presented during the catalysis with only 5–10 mol% of Cu2O as the catalyst.