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New Cs-symmetric aryl 1,4-diphosphine ligands were synthesized and tested in the copolymerization of carbon monoxide and propene. The electronic properties of the two different P-atoms did not affect the high enantioselectivity of the catalyst precursors, thus resulting in high ‘regio’- and ‘stereoregular’ copolymers.
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Leone et al. (2005) studied this question.
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