Question

What is the best reagent and conditions from the list below fill in # 1 - 3 from Homo A - L in key list key List: CH_3 CH_2 Cl, AlCl_3 HNO_3, H_2 SO_4 Br_2 FeBr_3 CH_3 CH_2 CH_2 CH_2 Cl, AlCl_3 NBS, ROOR, hv H_2, Pd NaBH_4 Br_2 CH_3, CH_2, CH_2, Cl, AlCl_3 What is the best reagent and conditions from the key list below to fill in #'0 1 - 2 CH_3 Cl, AlCl_3 HNO_2, H_2 SO_4 CH_3CH_2Cl, AlCl_3 H_3O^+ Br_2 Fe Br_3 Br_2 Fe Br_3 Br_2 NaNO_3 HNO_3, H_2 SO_4, Delta HNO_3, H_2 SO_4(room temp)

Answer 1

21)

1) A: CH3-CH2-Cl, AlCl3, it is a reagent used for alkylation. (Friedel craft's alkylation ).And product is ethyl benzene.

2) K: CH3-CO-Cl, AlCl3, it is a reagent for acylation.  (Friedel craft's acylation ).

When ethyl benzene undergoes acylation acyl group orients in para position , since ethyl group in benzene ring is ortho-para orienting. Ortho product is formed in less amount due to steric interaction.

3) E: NBS,ROOR, hv, NBS in presence of peroxide is used for selective ortho bromination.

Alci alkelation 3 2 CH3- co-cl Alcla Fredel c raft s C13 NBs, RooR, v

14)

1)  A: CH3-Cl, AlCl3, it is a reagent used for alkylation. (Friedel craft's alkylation ).Then toluene is formed.

2) H: HNO3/H2SO4 $\Delta$

Whe toluene obtained in first step is heated with the mixture of nitric acid and fuming sulphuric acid a mononitrotoluence at 30^o – 40^o C

2, 4–dinitrotoluence at 60^oC and 2, 4, 6- trinitrotoluene at 90^o – 110^oC are produced.

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