Substituted indenyl containing metal complexes and olefin polymerization
申请人:The Dow Chemical Company
公开号:US06015868A1
公开(公告)日:2000-01-18
Group 4 metal complexes comprising an indenyl group substituted in the 2 or 3 position with at least one group selected from hydrocarbyl, fluoro-substituted hydrocarbyl, hydrocarbyloxy-substituted hydrocarbyl, dialkylamino-substituted hydroacrbyl, silyl, germyl and mixtures thereof, said indenyl group further being covalently bonded to the metal by means of a divalent ligand group, catalytic derivatives thereof and their use as olefin polymerization catalysts are disclosed.
Alkene <i>anti</i>-Dihydroxylation with Malonoyl Peroxides
作者:Carla Alamillo-Ferrer、Stuart C. Davidson、Michael J. Rawling、Natalie H. Theodoulou、Matthew Campbell、Philip G. Humphreys、Alan R. Kennedy、Nicholas C. O. Tomkinson
DOI:10.1021/acs.orglett.5b02674
日期:2015.10.16
Malonoyl peroxide 1, prepared in a single step from the commercially available diacid, is an effective reagent for the anti-dihydroxylation of alkenes. Reaction of 1 with an alkene in the presence of acetic acid at 40 degrees C followed by alkaline hydrolysis leads to the corresponding diol (35-92%) with up to 13:1 anti-selectivity. A mechanism consistent with experimental findings is proposed that accounts for the selectivity observed.
Synthesis and characterization of unbridged metallocene dichloride complexes with two differently mono-substituted indenyl ligands and their application as catalysts for the polymerization of ethene and propene
作者:Roland Schmidt、Matthias Deppner、Helmut G Alt
DOI:10.1016/s1381-1169(01)00122-4
日期:2001.7
The synthesis of unbridged metallocene dichloride complexes of the type Ind(#)Ind ' ZrCl2 (Ind(#) = 2-arylalkyl-substituted indenyl, Ind ' = 1-omega -alkenyl-substituted or 2-alkyl-substituted indenyl) is described. The complexes are characterized by H-1 and C-13 NMR spectroscopy and mass spectrometry and tested for the catalytic polymerization of ethene and propene. The polymerization results and the polymer properties indicate a considerable influence of the catalyst structure on the polymerization behavior. (C) 2001 Elsevier Science B.V. All rights reserved.
ADAMCZYK, M.;WATT, D. S.;NETZEL, D. A., J. ORG. CHEM., 1984, 49, N 22, 4226-4237
作者:ADAMCZYK, M.、WATT, D. S.、NETZEL, D. A.
DOI:——
日期:——
Synthesis and Stereochemical Aspects of 2,6-Disubstituted Perhydroazulenes – Core Units for a New Class of Liquid Crystalline Materials
作者:Zakir Hussain、Henning Hopf、Ludwig Pohl、Thomas Oeser、Axel K. Fischer、Peter G. Jones
DOI:10.1002/ejoc.200500733
日期:2006.12
A novel approach for the synthesis of cis/trans-fused perhydroazulenes 13–19 is reported. The stereochemistry of the derivatives of carbene addition products 9a–c/20–22, of the 2,6-disubstituted perhydroazulenes 12a–c/23–25, and that of compounds 26–27 has been studied by single-crystal X-ray crystallography. The hydrogenation of the tropylidene to the perhydroazulene skeleton under various conditions