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MissPhiladelphia

Hemiacetals are compounds that are derived from aldehydes and ketones while acetals are compounds with a central carbon atom with 4 bonds attached to it. It must be saturated and has a tetrahedral geometry.

Explanation:


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A hemiacetal is the product of a reaction between an aldehyde and an alcohol.

The structure is

      R

       |

RO-C-H

       |

      OH


An acetal has two alkoxy groups. The structure is :

        H

         |

 OH-C-OR '

         |

        OR ''


Of the compounds given, the first two are hemiacetals.

The next three are acetals and the last two are others.

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