Pentafluorophenylation of aromatics with pentafluorophenyl perfluoro- and polyfluoroalkanesulfonates. A photoinduced electron-transfer cation diradical coupling process
作者:Qing Yun Chen、Zhan Ting Li
DOI:10.1021/jo00061a041
日期:1993.4
Irradiation of pentafluorophenyl perfluoro- and polyfluoroalkanesulfonates 1 with arenes, aromatic ethers, anilines, pyrroles, indoles, and phenols results in the corresponding pentafluorophenylated aromatic compounds. An electron-transfer mechanism is proposed.
Chen, Qing-Yun; Li, Zhan-Ting, Journal of the Chemical Society. Perkin transactions I, 1993, # 14, p. 1705 - 1710
作者:Chen, Qing-Yun、Li, Zhan-Ting
DOI:——
日期:——
ZWITTERIONISCHE NEUTRALE BOR ENTHALTENE ÜBERGANGSMETALLVERBINDUNG
申请人:TARGOR GmbH
公开号:EP1054914A1
公开(公告)日:2000-11-29
Catalyst Compositions Comprising Support Materials Having an Improved Particle-Size Distribution
申请人:Kuo Chi-I
公开号:US20110184132A1
公开(公告)日:2011-07-28
A catalyst composition that includes a support material having an improved particle-size distribution is provided. Processes for producing polyolefin composition also are provided. Polymers and films also are provided. An example of a catalyst composition is a supported multi-transition-metal catalyst composition that includes: (a) at least two catalyst components selected from the group consisting of: a nonmetallocene catalyst component and a metallocene catalyst component; (b) a support material that has a D
50
of less than about 30 microns and a particle size distribution having a D
90
/D
10
ratio of less than about 6; and (c) an activator.