NMR examination of catalysts

In order to obtain more information about the structure of the catalysts, the NMR spectra of the following catalysts were examined  

The C NMR spectra consist of a large number of peaks, which may indicate a variety of structures. As a 

The large number of peaks is difficult to explain. They may arise because of the different groups or for stereoscopic reasons. The peaks from the Ti-CH2-groups may also lie in this range [11a]. The recordings did not take into account the relaxation times of the C atoms, which may vary strongly. Hence, no quantitative evaluation of the peak intensities could be made. 

From the ratio of the -OCH2 and AI-CH2 peak intensities in the H NMR spectra for the 1 1 catalyst, it was shown that from 1 mol Ti (or A1(C2H5)3) only 2.3 

The resolution of the NMR spectrum of the 2 1 catalyst was so poor (broad band bases) that the integrals of the individual groups could not be separated out. Half the intensity of the Me-0-CH2 peaks was concentrated on a triplet at around 3.9 ppm and the other half spread over several broad peaks. 

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