Question

Please let me know why it is necessary to scrupulously oven-or flame-dry the glass used in Grignard reaction? Please write the reaction.

Answer 1

Grignard reagents are highly sensitive to water. If you add water, then the magnesium acquires a hydroxide while the original grignard reagent acquires a proton instead, and gets deactivated.

Look at the bottom reaction here, except replace `D` with `H` and you have the same reaction.

Note: This tends to be part of a lab you do early in the year for Organic Chemistry II. I think you should ask your professor if you have questions about your lab, because they will be around.