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What will be the strength of coupling between geminal protons in the following molecules?
  • a)
    Decrease as the size of ring increase
  • b)
    Increase as the size of ring increase
  • c)
    Remains same
  • d)
    No relation between the size of the ring & coupling
Correct answer is option 'B'. Can you explain this answer?
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What will be the strength of coupling between geminal protons in the f...
Geminal proton 2J coupling i.e. coupling of H & H on same carbon.

as ring size increases, bond angle outside decreases i.e. α1 > α2 > α3 > α4 (according % s character). If B.A. decreases, 2J coupling increases.
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What will be the strength of coupling between geminal protons in the f...
Geminal proton 2J coupling i.e. coupling of H & H on same carbon.

as ring size increases, bond angle outside decreases i.e. α1 > α2 > α3 > α4 (according % s character). If B.A. decreases, 2J coupling increases.
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What will be the strength of coupling between geminal protons in the f...
Geminal proton 2J coupling i.e. coupling of H & H on same carbon.

as ring size increases, bond angle outside decreases i.e. α1 > α2 > α3 > α4 (according % s character). If B.A. decreases, 2J coupling increases.
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