Problem: Isopentyl Acetate (Banana Oil)- IR SpectrumAssign the following IR peaks: alkane C–H stretch, C=O stretch, alkane CH2 bend and C–O stretch. 

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Given: Isopentyl acetate → ester (RCOOR')


Characteristic IR spectrum values:

  • alkane 
    • C-H stretch → 2990 – 2850 cm-1
    • C- H bending → 1380 - 1385 cm-1
  • Esters 
    • C=O stretch
      • 1765 – 1735 cm-1 (sat.)
      • 1730 – 1715 cm-1(conj.)
    • C-O stretch
      • 1163-1210 cm-1
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Problem Details

Isopentyl Acetate (Banana Oil)- IR Spectrum

Assign the following IR peaks: alkane C–H stretch, C=O stretch, alkane CH2 bend and C–O stretch. 


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