The IR spectrum A is the compound heptanal. The structure of the heptanal is In the IR
Question:
The IR spectrum A is the compound heptanal. The structure of the heptanal is
In the IR spectrum the peaks at below 3000 cm-1 corresponds to the sp3 carbons i.e. asymmetric and symmetric -CH3 stretching. The second peak at 2750 cm-1is due to fermi resonance of the aldehyde. This is an unique for the aldehyde compounds.
The third peak at 1725 cm-1is due to aldehyde carbonyl stretching. This confirms the presence of heptanal.
The IR spectrum B corresponds to the acetic acid (CH3COOH). The -OH stretching of acid shows an broad peak 3400- 2400 cm-1.
The carbonyl stretching of acid carbonyl occurs at 1700 cm-1. This confirms the structure is acetic acid.
The IR spetrum C corresponds to the 2-butanol because -OH stretching shows a sharp peak at between 3400-3300 cm-1. The peaks at below 3000 cm-1 corresponds to the sp3 carbons i.e. asymmetric and symmetric -CH3 stretching. This confirms the 2-butanol.
The IR spetrum D corresponds to the compound 3-pentanone because the peaks at below 3000 cm-1 corresponds to the sp3 carbons i.e. asymmetric and symmetric -CH3 stretching. The characteristic keto carbonyl stretching observed at 1715 cm-1 . This confirms the presence of 3-pentanone.
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