Missing elements of Grignard reagent reactions

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The discussion centers on the missing elements in two Grignard reagent reactions involving butanal and bromobenzene, and bromophenylmagnesium with cyclohexylethyne. The first reaction lacks a magnesium atom, which is essential for forming a Grignard reagent, while the second reaction is noted to be incomplete due to the absence of a carbonyl and acidic conditions. Participants express uncertainty about the nature of the homework question, suggesting it may require identifying flaws rather than providing standard answers. It is emphasized that reviewing suitable reagents for these reactions is crucial for understanding the expected products. Overall, the discussion highlights the importance of proper reagent composition in 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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