Question

all 2019 3. Which functional group(s) are consistent with the FTIR? Explain by referencing specific absorptions by wavenumber.

Answer 1

The IR data may be summarized as; 1.2600-3200 cm: VO-H Stretch. Cavid present) Broad banda stretch. • 308) cin' Aromátic =(-H Stretch. • 2918 cmt: S8 -(-H stretch. Calkane) • 2726 m' | aldehydied - C-H hydrogen 1. 1710 cm": dc=0 stretch Caldehyde) ! 1675 cmt: Vc=0 stretch (lauid) 1. 1644 cmt: C=C stretch. 1. 1436 cm : – (CH Bending • 1375 cm! c-c Stretching vibration 1. 1330 cm: C-o stretch fauid

The main functional groups which are present are carboxylic acid and aldehyde

2) as oxygen atoms are also present so the hypothetical formula consisting of only carbon and hydrogen is ruled out.