Show how you would synthesize the following alcohols by adding Grignard reagents to ethylene oxide.

1. 2-phenylethanol
2. 4-methylpentan-1-ol
3. 

When ethylene oxide (oxirane) is treated with Grignard reagent (RMgX), it forms and then hydrolysis to form primary alcohol.Grignard reagents break the epoxide ring.

a.

When Grignard reagent (C₆H₅MgBr) is added to ethylene oxide, it forms C₆H₅-CH₂-CH₂-OMgBr and further hydrolysis to form primary alcohol (C₆H₅-CH₂-CH₂-OH). The dark bond describes a new C-C bond.

b.When Grignard reagent (CH₃-CH(CH₃)-CH₂MgCl) is added to ethylene oxide, it forms

CH₃-CH(CH₃)-CH₂CH₂-CH₂-OMgCl and further hydrolysis to form primary alcohol

(CH₃-CH(CH₃)-CH₂-CH₂-CH₂-OH ). The dark bond describes a new C-C bond.

c. When Grignard reagent (RMgI) is added to ethylene oxide, it forms RCH₂-CH₂-OMgI and further hydrolysis to form primary alcohol (RCH₂-CH₂-OH). The dark bond describes a new C-C bond.