Reactions involving Grignard reagents?

How do Grignard reagents react with alkenes, alkynes and haloalkanes?

For example, how would ethyl magnesium bromide react with t-butyl bromide and propyne respectively?

Also, what would happen if EtMgBr reacted with 1-bromobut-2-ene?

Any clues would be much appreciated!

2 Answers

  • 1 decade ago
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    Grignard reagents act as nucelophiles and do not react with the unsaturated bonds of alkenes and alkynes.

    Halogenoalkanes react with magnesium to form Grignard reagents of the form RMgX. Adding another halogenoalkane into the reaction mixture will just form another Grignard reagent R'MgX.

    In the reaction of 1-bromobut-2-ene with RMgX the bromine atom is replaced by the R group.

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  • 4 years ago

    Compounds of empirical formula RMgX are called grignard reagent where R can be alkyl or aryl and X can be Cl, Br, I

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