# Complete this series of reactions [closed]

Cyclohexene is treated with $\ce{RCOOOH}$ and 'A' is formed. A is treated with $\ce{CH3MgBr}$ and 'B' is formed. On hydrolysis of B we get 'C'. Identify A,B,C.

I identify A as cyclohex-1,2-diol. Could someone give me assistance after that please.

## closed as off-topic by Gaurang Tandon, Mithoron, aventurin, Tyberius, ronApr 3 '18 at 17:12

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• I suggest you read "the reaction of alkenes with peracids" first, then Grignard reaction (assuming you are in OCHEM II class). – Mathew Mahindaratne Apr 3 '18 at 16:42

Now when you treat this with $\ce{CH_3MgBr}$, there is a nucleophilic attack( $S_N2$ ) by $\ce{CH_3^-}$ at one of the two carbons to which oxygen is attached, and the ring opens to form 2-methyl cyclohexanoxide Magnesium Bromide.As, in this case the substitution mostly occurs through $S_N2$, it is most probable to get a trans product. So, In B), major is the following compound
• Oxygen can still coordinate to $Mg^{2+}$ being in that epoxide (ether) form, why does the ring need to open up for that?? – Soumik Das Apr 3 '18 at 16:48