The group IV metal chelating diamide complex 2 has been prepared and characterized by 1 H and 13 C{ 1 H} NMR spectroscopy and single-crystal X-ray structure analysis. This complex is an active catalyst upon combining with the appropriate activator. The catalyst efficiencies, however, are considerably lower than those of Cp-based catalysts. The polydispersities of the polymers produced were found to be broader than those observed for Cp-based single-site catalytic systems.
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Patton et al. (2002) studied this question.
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