Which of the following esters on reaction with excess Grigrand reagent give a tertiary alcohol, which on heating give an alkene which exhibits geometrical isomerism

Options

A. `CH_3CH_2 COOC_2 H_5 +CH_3 MgBr`
B. `HCOOC_2H_5 +CH_3CH_2MgBr`
C. `CH_3 COOC_2H_5 +CH_3 CH_2 MgBr `
D. `HCOOC_2 H_5 +CH_3 MgBr`

Answer

B, C

Explanation

`CH_3 -CH_2 - underset(CH_3) underset(|)overset(OH) overset(|)C-CH_3 ` No Geometrical isomerism
`(b ) H underset(CH_3) underset(|) underset(CH_2) underset(|) overset(OH) overset(|)C-CH_2 CH_3to underset("Exhibit isomerism")(CH_3 -CH_2 -CH =CH -CH_3)`
` (C ) CH_3 - underset( CH_3) underset(|) underset(CH_2) underset(|) overset(OH) overset(|) C-CH_2 -CH_3 to underset("Exhibits geometrical isomerism ") (CH_3-CH= underset(CH_3) underset(|) C-CH_2 -CH_3)`