Year 2005, Month 10 (Section Full Articles, Page 2330)
Spectrophotometric study of zirconocene/polymethylalumoxane catalytic
systems: principal component analysis and parametric modeling
A. G. Ryabenko, E. E. Faingol´d, E. N. Ushakov, and N. M. Bravaya
Transformation of electronic absorption spectra of zirconocene catalytic systems
Ph2CCpFluZrCl2—polymethylalumoxane (MAO) and rac-Me2Si(2-Me,4-PhInd)2ZrCl2—MAO (Flu is fluorenyl, Ind is indenyl) in toluene was studied upon a change in the ratio of reactants AlMAO/Zr from 0 to 3000 mol mol–1. Analysis of the spectroscopic data using statistical methods determined the number of reaction products in each system. A reaction model including three equilibria and being common for the both systems was proposed. Effective equilibrium constants and absorption spectra of individual reaction products were determined by parametric selfmodeling of the experimental spectra.
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