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Abstract
Preparation of compounds containing chlorofluorinated chains and [sbnd]CH2I or [sbnd]CH2[sbnd]CH[dbnd]CH[sbnd]CH2Cl end groups was carried out either through classical chemical synthesis on using telomerization of Cl3C[sbnd](CF2[sbnd]CFCl) n [sbnd]Cl and CF3[sbnd]CCl3 with butadiene. Triethylphosphite does not react upon telomers presenting an iodinated termination even if it is a [sbnd]CH2[sbnd]CH2[sbnd]I end group.
Contrasting with this behaviour, butadiene derivatives lead to the expected phosphonates, when the chain contains three halogenated C atoms: RF.Cl[sbnd]CCl2[sbnd]CH2[sbnd]CH[dbnd]CH[sbnd]CH2[sbnd]P(O)(OEt)2 with RF.Cl=[sbnd]CF3.[sbnd]CF2[sbnd]CFCl2. For the higher homologs, dienes are formed following the action of P(OEt)3 upon the [sbnd]CFCl group present in the chain.