Investigation of the structure of the products from telomerization of ethylene with 1,3-diheterocyclopentanes by the13C NMR method

Abstract

1. The behavior of 1,3-diheterocyclopentanes (X=O), NC4H9, S; R=H, CH3) in radical telomerization with ethylene was compared. The nature of the heteroatom and the presence of a substituent in the OCHRX group have a significant effect on the ratio of the competing addition and ring-opening reactions in the radical . 2. The relationships governing the variation of the chemical shifts of the signals in the13C NMR spectra of the telomers of 1,3-dibeterocyclopentanes in relation to the nature of the heteroatoms were investigated. The combination of the characteristic signals in the13C NMR spectra makes it possible to assign the investigated compounds reliably to the linear and cyclic series.