Ultraviolet spectra and structure of unsaturated compounds of elements of group IV

Summary In the series of compounds CH₂=CH-(CH₂)_n-XR₃ the greatest bathochromic shift of the absorption bands is observed in the allyl compounds. The magnitude depends essentially on the nature of the atoms of the XR₃ group. The bathochromic shift is maximal for a nonplanar position of the double bond and the C-X bond. The results observed cannot be explained by d- interaction or inductive effect and they are in agreement with the idea of a - interaction.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12 p. 2203–2206, December, 1964