The radiation-initiated telomerization of diethyl malonate (1) and ethylene leads to the even-numbered n-alkylmalonic acid diethylesters and the even-numbered n-alkyl-n-butylmalonic acid diethylesters. The yields of the n-alkyl-n-butylmalonic acid diethylesters referring to the yields of n-alkylmalonic acid diethylesters are increased by elevating the temperature and by lowering the pressure. High temperatures and low pressures favour the formation of short-chained telomers. The product distribution is independent from the absorbed dose and the dose rate. The G-values are: G (ester) 55; G(—C2H4) 230, the activation energy is 12.5 KJ/mol, the chain-transfer constants are about 0.2, and the rearrangement constants are about 2.5.
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