Question

What happens when 1 2 dibromoethane is heated with zinc dust?

Answer 1

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$<b>$Reaction of zinc with 1,2-dibromoethane is used to activate the metal surface for subsequent reaction with another alkyl/aryl halides etc. to form organozinc compounds.

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Answer 2

1,2‐Dibromoethane is commonly used to chemically activate Magnesium metal for use in forming Grignard reagents. ... For example, upon heating with this reagent in ethanol, zinc powder reacts exothermically to produce activated zinc that will reduce triple bonds to cis‐double bonds in a variety of compounds (eq 2).