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Simun Mishra posted an Question

June 20, 2020 • 14:48 pm

30 points

IIT JAM
Chemistry (CY)

What is skew form ?

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Dinesh khalmaniya 1

check it
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Dinesh khalmaniya 1

In the most stable conformation, the two methyl groups lie as far apart from each other as possible with a dihedral angle of 180 degrees. This particular staggered conformation is called anti. The other staggered conformation has a Me-Me dihedral angle of 60 degrees and is called gauche.
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Simun mishra

60 degree is for anti
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Suman Kumar

See structure II is skew
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I is gauche & III is staggered
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This is newman for butane
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1 is anti
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60 degree for anti and 180 for gauch
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can u explain anti and gauch
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Here see the dihedral angle between the two methyl. 60⁰ is gauche & 180⁰ is anti or sttagered.
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Suman Kumar

In conformations of butane along C2-C3 bond,when in newmann projections we represent two methyl groups at 60. position , conformation is gauche. Skew conformations are infinite conformations in between the specific ones formed due to rotation along the bond but they are not anti,staggered, or gauche.
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Dinesh khalmaniya 1 Best Answer

this is skew conformation because here bond angle is in between eclipsed and staggered form
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means like staggered thita angle =60 ,180 ,300 like that in skew the angle is 29?
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for skew conformation bond angle must not be O, 60, 120 ....
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for skew infinite angle can be but must not be the angle of eclipsed, staggered i.e., 0,60,120,180 so on
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did you get it?
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then bond angle = ...... .... for skew
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ok
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can u pls explain anti and gauch
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sure
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Dinesh khalmaniya 1

Skew conformations are infinite conformations in between the specific ones formed due to rotation along the bond but they are not anti,staggered, or gauche.
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can you explain it with example
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yes, wait
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