QQuestionChemistry
QuestionChemistry
Below is the IR spectrum for isoamyl acetate (banana oil). Which peaks correspond to functional groups present in isoamyl acetate?
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Answer
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Step 1:: Identify the peaks in the IR spectrum that correspond to functional groups present in isoamyl acetate.
Isoamyl acetate is an ester with the molecular formula C^6H^12O^2. Esters have two functional groups: an alkyl group (R) and an acyl group (RCO). The alkyl group in isoamyl acetate is isoamyl (C^5H^11), and the acyl group is acetyl (CH^3CO).
Step 2:: Examine the IR spectrum and compare it to the general characteristics of the functional groups.
- C-O stretching: 1000-1300 cm$^{-1}$
The following are the general IR absorption ranges for the functional groups in isoamyl acetate: - Alkyl group (R): - Acyl group (RCO):
Step 3:: Compare the IR spectrum of isoamyl acetate to the general characteristics of the functional groups.
- The peak at 1240 cm$^{-1}$ corresponds to the C-O stretching of the acyl group (RCO).
Based on the given IR spectrum, the following peaks correspond to the functional groups in isoamyl acetate:
Final Answer
The peaks at 2940 cm$^{- 1}$, 1460 cm$^{- 1}$, 1740 cm$^{- 1}$, and 1240 cm$^{- 1}$ in the IR spectrum correspond to the functional groups present in isoamyl acetate: the alkyl group (R) and the acyl group (RCO).
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