केला तेल (आइसोएमाइल एसीटेट) संश्लेषण

केले के स्वाद के लिए जिम्मेदार एस्टर बनाना

Organic Synthesis Advanced (University) 90 मिनट ~$22.00

उद्देश्य

यह दर्शाते हुए कि एस्टर फलों का स्वाद कैसे बनाते हैं, एसिटिक अम्ल और आइसोएमाइल अल्कोहल के फिशर एस्टरीकरण द्वारा आइसोएमाइल एसीटेट (केला तेल) का संश्लेषण करें।

पृष्ठभूमि

Isoamyl acetate is the ester responsible for the characteristic smell of bananas. It is synthesized by the acid-catalyzed reaction of isoamyl alcohol with acetic acid. This experiment demonstrates ester formation, liquid-liquid extraction, and the connection between molecular structure and sensory properties.

सुरक्षा चेतावनियाँ

  • Concentrated H₂SO₄ is extremely corrosive
  • Glacial acetic acid causes burns
  • Isoamyl alcohol is flammable
  • Work in a fume hood throughout

आवश्यक PPE

goggles gloves lab_coat

सामग्री

  • Isoamyl alcohol (3-methyl-1-butanol) (5 mL)
  • Glacial acetic acid (7 mL)
    Excess
  • Sulfuric acid (H₂SO₄) (1 mL)
    Concentrated, catalyst
  • Sodium bicarbonate solution (50 mL)
    5%
  • Anhydrous sodium sulfate (5 g)
    Drying agent

उपकरण

Round-bottom flask (100 mL) Reflux condenser Heating mantle Separating funnel Boiling chips

प्रक्रिया

1

Add 5 mL isoamyl alcohol and 7 mL glacial acetic acid to the round-bottom flask with boiling chips.

3 मिनट Fume hood required
2

Slowly add 1 mL concentrated H₂SO₄ as catalyst.

2 मिनट Add very slowly — exothermic
3

Attach reflux condenser and heat at gentle reflux for 60 minutes.

60 मिनट Ensure condenser water flows
4

Cool and transfer to a separating funnel. Add 25 mL water and shake.

3 मिनट
5

Wash the organic layer with 25 mL of 5% NaHCO₃. Vent frequently.

5 मिनट CO₂ produced — vent
6

Dry the organic layer over Na₂SO₄ for 10 minutes. Filter and smell by wafting.

12 मिनट Waft — do not sniff directly
7

Calculate the yield and record the banana-like aroma.

5 मिनट

अपेक्षित परिणाम

A clear, pale yellow liquid with a strong banana aroma (isoamyl acetate). Typical yield is 50-65%. The unmistakable banana smell confirms successful ester formation.

सफाई

Dispose of organic waste in designated containers. Neutralize acid waste. Rinse glassware with acetone then water.

Frequently Asked Questions

What is the objective of केला तेल (आइसोएमाइल एसीटेट) संश्लेषण?
यह दर्शाते हुए कि एस्टर फलों का स्वाद कैसे बनाते हैं, एसिटिक अम्ल और आइसोएमाइल अल्कोहल के फिशर एस्टरीकरण द्वारा आइसोएमाइल एसीटेट (केला तेल) का संश्लेषण करें।
How difficult is केला तेल (आइसोएमाइल एसीटेट) संश्लेषण?
This experiment is rated as Advanced (University). It takes approximately 90 minutes to complete.
What safety precautions are needed for केला तेल (आइसोएमाइल एसीटेट) संश्लेषण?
Key safety precautions include: Concentrated H₂SO₄ is extremely corrosive; Glacial acetic acid causes burns; Isoamyl alcohol is flammable.
What materials are needed for केला तेल (आइसोएमाइल एसीटेट) संश्लेषण?
The main materials required are: Isoamyl alcohol (3-methyl-1-butanol), Glacial acetic acid, Sulfuric acid (H₂SO₄), Sodium bicarbonate solution, Anhydrous sodium sulfate.
What results should I expect from केला तेल (आइसोएमाइल एसीटेट) संश्लेषण?
A clear, pale yellow liquid with a strong banana aroma (isoamyl acetate). Typical yield is 50-65%. The unmistakable banana smell confirms successful ester formation.