New structurally rigid palladium catalysts for the alternating copolymerization of carbon monoxide and ethene

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Abstract
Decreasing the flexibility of the Ph2PCH2CH2PPh2 (dppe) backbone by making the central carbon atoms part of a cyclobutane ring leads to the formation of Pd(II) catalysts for CO/ethene copolymerization that are more efficient than those of dppe by a factor of ten.