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Write the conformations of ethane....

Write the conformations of ethane.

A

Free rotation about C-C single bond

B

Restricted rotation about C-C single bond

C

Absence of rotation about C-C bond

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
A
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Draw Newman and sawhorse projections for the eclipsed and staggered conformations of ethane. Which of these conformations is more stable and why ?

Assertion : Staggered conformation of ethane is 12.5 kJ mol^(−1) more stable than the eclipsed conformation. Reason : The two conformations of ethane cannot be separated at room temperature.

Knowledge Check

  • Which conformation of ethane has the lowest potential energy ?

    A
    Eclipsed
    B
    Skew
    C
    Staggered
    D
    All will have equal potential energy

  • Assertion: Staggered conformation of ethane is most stable while eclipsed conformation is least stable. ltbr. Reason: Staggered form has the least torsional strain and the eclipsed form has the maximum torsional strain.

    A
    If both assertion and reson are true and reason is the correct explanation of assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • The most stable conformation of ethylene glycol is :

    A
    Anti
    B
    Gauche
    C
    Partially eclipsed
    D
    Fully eclipsed

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    In the following structures which two forms are stagered conformations of ethane?

    Which of the following is the most preferred conformation of ethane molecule

    The dihedral angle between the hydrogen atoms of two methyl groups in staggered conformation of ethane is

    The dihedral angle between the hydrogen atoms of two methyl groups is staggered conformation of ethane is

    What is the energy difference between the staggered and eclipsed conformations of ethane?

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