Unbridged metallocene dichloride complexes with mono-substituted indenyl ligands and their application for the polymerization of propene
作者:Roland Schmidt、Helmut G Alt
DOI:10.1016/s0022-328x(00)00776-2
日期:2001.3
synthesis of unbridged metallocene dichloride complexes of the type Ind′2ZrCl2 (Ind′=2-alkyl- or arylalkyl-substituted indenyl) is described. The complexes are characterized by 1H- and 13C-NMR spectroscopy and mass spectrometry. After activation with methylalumoxane these complexes can be used for propenepolymerization; they produce block copolymers consisting of alternating isotactic and atactic blocks
Synthesis and Stereochemical Aspects of Ethyl 1,1a,2,3,4,5,6,6a-Octahydro-4-octylcyclopropa[f]indene-1-carboxylate
作者:Zakir Hussain、Debasis Koley、Henning Hopf
DOI:10.1002/hlca.200590262
日期:2005.12
A novel approach for the synthesis of carbene adducts 9a/9b and 10/11 is reported. Identification of the geometric and positional isomers of carbene addition was carried out by reversed-phase HPLC, and the establishment of the structure and configuration of 9a/9b was performed by means of 2D-NMR.