Missing elements of Grignard reagent reactions

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SUMMARY

The discussion centers on the missing elements in Grignard reagent reactions involving butanal and bromobenzene, as well as bromophenylmagnesium and cyclohexylethyne. It is established that the first reaction lacks magnesium, which is essential for forming the Grignard reagent, while the second reaction is incomplete due to the absence of a carbonyl group and acidic conditions. Participants emphasize the need to review suitable reagents for these reactions to identify flaws and alternatives. The conversation highlights the importance of understanding the fundamental requirements for successful Grignard reactions.

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Homework Statement



Find the product of each reaction

Homework Equations



Butanal (http://www.chemspider.com/Chemical-Structure.256.html?rid=e530204e-5d67-41a8-88e9-fc8e0ffcf41b), reacted first with bromobenzene (http://www.chemspider.com/Chemical-Structure.7673.html?rid=9d9b30cd-5d16-4f10-a320-9b2a445fef1f) then in acid (H3O+)

Bromophenylmagnesium (http://www.chemspider.com/Chemical-Structure.10254417.html) with cyclohexylethyne (http://www.chemspider.com/Chemical-Structure.63448.html) in diethyl ether

The Attempt at a Solution



I'm really not sure where either go, as neither of them seem to be a standard Grignard reagent reaction. The first is missing an Mg between the carbon group and the halogen, and the second is missing both a carbonyl (C=O) and acidic conditions. Are there alternatives to the standard reaction?
 
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There's no way for any of us to answer this question. We don't know how the question was worded or if you were assigned to find flaws.

In the first case you are missing a magnesium as you've indicated. In the second case you are given a primary alkyne as a reagent. Review your list of suitable/unsuitable reagents for this type of reaction for your answer.
 

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