In the following reactions, \bo {P}, \bo {Q}, \bo {R} and \bo {S} are the major products. {\CH}_3 {\CH}_2 {\CH} ( {\CH}_3) {\CH}_2 {\CN}\stackrel{(\i)\PhMgBr,\then \H_3\O^{⊕}{───────\xrightarrow}_{(\ii) \PhMgBr,\then \H_2\O}\P \Ph-\H+\CH_3\C^{||↖{\O}}\Cl\stackrel{(\i) \anhyd.\AlCl_3}{───\xrightarrow[(\ii) \PhMgBr,\then \H_2\O]{}\Q \CH_3\CH_2\C^{||↖{\O}}\Cl\stackrel{1/2(\Ph\CH_2)_2\Cd}{─\xrightarrow[(ii)\PhMgBr,\then\H_2\O]{}\R {\PhCH}_2 {\CHO}\stackrel{(i)\PhMgBr,\then\H_2\O (ii)\CrO_3,\dil.\H_2SO_4}{──────────────\xrightarrow[(iii \HCN) (iv) \H_2\SO_4]{}S The correct statement(s) about \bo {P}, \bo {Q}, \bo {R} and \bo {S} is(are) [JEE Adv 2023 P1]

Both \bo {P} and \bo {Q} have asymmetric carbon(s)

Both \bo {Q} and \bo {R} have asymmetric carbon(s)

Both \bo {P} and \bo {R} have asymmetric carbon(s)

\bo {P} has asymmetric carbon(s), \bo {S} does not have any asymmetric carbon

JEE Advanced 2023 Paper 1 Solutions

Section: Chemistry

Question : 19 of 51

Marks: +1, -0

In the following reactions, P,Q,R and S are the major products.

CH3CH2‌CH(CH3)‌CH2‌CN‌

(i)‌PhMgBr,then‌H3‌O⊕

──────────────▶

(ii)‌PhMgBr,then‌H2‌O

‌P
Ph−H+CH3

‌Cl‌

(i)‌anhyd.AlCl3

──────────▶

(ii)‌PhMgBr,then‌H2‌O

‌Q
CH3CH2

‌Cl‌

(Ph‌CH2)2‌Cd

────────▶

(ii)‌PhMgBr,then‌H2‌O

‌R
PhCH2‌CHO‌

(i)‌PhMgBr,then‌H2‌O(ii)‌CrO3,dil.H2SO4

─────────────────────▶

(iii‌HCN)‌‌‌(iv)H2SO4

‌S

The correct statement(s) about P,Q,R and S is(are)

[JEE Adv 2023 P1]

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