125471.fig.005a
(a)
125471.fig.005b
(b)
Figure 5: The 𝜈 O D bands in the IR spectra of polycrystalline samples of (a) d 1-2-furanacetic acid (ca. 45%H and 55%D) and (b) d 1-2-furanacrylic acid (ca. 20%H and 80%D) dispersed in KBr pellets. Temperature effect in the spectra.