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Investigating the formation of an adduct of formamide with dioxane by means of Raman spectroscopy
Author(s) -
Norbert Gabriel,
Alves Wagner A.
Publication year - 2008
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2003
Subject(s) - adduct , formamide , raman spectroscopy , chemistry , tetrahydrofuran , analytical chemistry (journal) , spectroscopy , organic chemistry , optics , physics , quantum mechanics , solvent
Raman experiments of formamide (FA) and p ‐dioxane (DX) mixtures at different compositions were carried out. A red shift of the CO stretching band of DX was observed upon dilution, while blue shifts were observed for the CH stretching and COC bending bands. In this latter region, the new band at ∼441 cm −1 , whose intensity shows large dependence on the FA concentration, has been assigned to an FA–DX adduct and it is reported for the first time in the literature. The spectral changes observed in the COC bending region allowed to determine a proportion of 4:1 FA–DX and this experimental evidence is also presented for the first time by Raman spectroscopy. The present work shows an excellent agreement with our previous investigation, where the 2:1 FA—THF (tetrahydrofuran) adduct was characterized. Copyright © 2008 John Wiley & Sons, Ltd.