Spectres de vibration de composes organiques des elements de la colonne IVB: VII. Derives cycliques oxygenes du silicium, du germanium et de l'etain: Relation entre leur structure et leurs spectres de vibration

摘要: Abstract An analysis of the infrared spectra, in 1200–900 cm −1 region, compounds type R 2 MCH CHR′CHR″O or MCHCHCR′R″O (R M = Me Si, Et Ge n-Bu Sn; R′ R″ H Me), allows us to distinguish between monomers, coordination dimers, true dimers with large cycles, polymers. The appearance, increasing time, several bands, vicinity expected maximum intensity is an indication presence various monomeric polymeric species different proportions.