When one of the enantiomers of 2-butanol is placed in a polarimeter, the observed rotation is 4.05anddeg; counterclockwise at 25 anddeg;C. The solution was made by diluting 6 g of 2-butanol to a total of 40 mL, and the solution was placed into a 200-mm polarimeter tube for the measurement. Select the correct specific rotation for this enantiomer of 2-butanol.a)13.5anddeg; deg cm2g-1b)-13.5anddeg; deg cm2g-1c)andndash;27anddeg; deg cm2g-1d)27anddeg; deg cm2 g-1Correct answer is option 'B'. Can you explain this answer?

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When one of the enantiomers of 2-butanol is placed in a polarimeter, the observed rotation is 4.05° counterclockwise at 25 °C. The solution was made by diluting 6 g of 2-butanol to a total of 40 mL, and the solution was placed into a 200-mm polarimeter tube for the measurement. Select the correct specific rotation for this enantiomer of 2-butanol.

a)
13.5° deg cm² g^-1
b)
-13.5° deg cm² g-1
c)
–27° deg cm² g^-1
d)
27° deg cm² g^-1

Correct answer is option 'B'. Can you explain this answer?

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When one of the enantiomers of 2-butanol is placed in a polarimeter, t...

Since it is levorotatory, the value of the observed rotation is -4.05°
The concentration is 6 g per 40 mL = 0.15 g/mL

and the path length is 200 mm = 2 dm. (10 cm = 1 dm; 10 mm = 1 cm)

The value of specific rotation (α) is

= - 13.5 deg cm² g^-1
Hence, the specific rotation for this enantiomer of 2-butanol is - 13.5 deg cm² g^-1.

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When one of the enantiomers of 2-butanol is placed in a polarimeter, the observed rotation is 4.05° counterclockwise at 25 °C. The solution was made by diluting 6 g of 2-butanol to a total of 40 mL, and the solution was placed into a 200-mm polarimeter tube for the measurement. Select the correct specific rotation for this enantiomer of 2-butanol.a)13.5° deg cm2g-1b)-13.5° deg cm2g-1c)–27° deg cm2g-1d)27° deg cm2 g-1Correct answer is option 'B'. Can you explain this answer? for UGC NET 2024 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about When one of the enantiomers of 2-butanol is placed in a polarimeter, the observed rotation is 4.05° counterclockwise at 25 °C. The solution was made by diluting 6 g of 2-butanol to a total of 40 mL, and the solution was placed into a 200-mm polarimeter tube for the measurement. Select the correct specific rotation for this enantiomer of 2-butanol.a)13.5° deg cm2g-1b)-13.5° deg cm2g-1c)–27° deg cm2g-1d)27° deg cm2 g-1Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for UGC NET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When one of the enantiomers of 2-butanol is placed in a polarimeter, the observed rotation is 4.05° counterclockwise at 25 °C. The solution was made by diluting 6 g of 2-butanol to a total of 40 mL, and the solution was placed into a 200-mm polarimeter tube for the measurement. Select the correct specific rotation for this enantiomer of 2-butanol.a)13.5° deg cm2g-1b)-13.5° deg cm2g-1c)–27° deg cm2g-1d)27° deg cm2 g-1Correct answer is option 'B'. Can you explain this answer?.

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