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VSEPR and Bond Hybridization

AP Chemistry· difficulty 3/5

Free rotation around a bond is possible for

  • A

    Triple bonds (sigma + 2 pi)

  • B

    Double bonds (sigma + pi)

  • C

    All bonds equally

  • D

    Single bonds (sigma only)

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Explanation

Single (σ) bonds rotate freely. Double/triple bonds have π components — rotation would break π overlap. This explains cis/ trans isomerism around C=C.

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