Question

FOR EACH QUESTION:

1. Why is the wrong answer wrong?

2. Why is the right answer right?

3. Which reaction does each problem involve?

#5 What is the correct starting material for the reaction shown? Wrong Answer A CH,COOH #6 Which combination(s) of organic bromide and carbonyl compound can be used to prepare the alcohol in the box by reaction of the Grignard reagent derived from the alkyl bromide with the carbonyl compound? Wrong Answer B a) only 1 b) only 1 and 2 c) 1, 2 and 3 d) only 3 and 4 e) 1,2, and 4 #9 Select the reaction(s) that would give 3-hexanone as the major organic product. Wrong Answer E 1) MgBr 2) HCI, H,0 ܙܘ 1) (CH.CH), Culi ether 2) H0 ܢ HgSO4 HO.H.SO -CEC- a) 1 only b) 2 only c) 3 only d) 2 and 3 e) 1 and 3

Answer 1

solution :- Br2 CH3COH is correct. option (C) Mechanismi сну соон HBr & for • Reason other option are incorect :- occurs on Incorrect (9) Bromination alkene a Br2 CAL CO2H Incorrect (6) it cannot be product. But their since, alcohol is present and oxidised to ketone to give is addition an double bondo Egi- on C on 1 BY Boz ск, co, и Xx Incorrect (de, as it has not contre to react. other side. Incorrect (eg, and forms It also different enolise but from product X erbert

has already shown. ② option (c) right, mechanism Ketone in acidic medium. ③ It is an enolisation of followed by bromination nomination Solutn 6) in correct combination to give following all option which product Let does - us the Check form - Comination .. " CHOBO I meen! CH₂ Br & mg - CH₂ mg Br pong By CH3 ifche . (product) 1. is correct I combination Λαβή ) mech: 484 BY mgbr Mo (product)

2. option is also correct i » Косиз OCH 3 Combination. NB Mechis - norma, onger a OCH -By mg Bo la Bo 1. CHAQ тұ31 gong by (Reaction not stop) and reaut futher W ой Lesot Rv sa + mecburen (final product] clearly . option (3) is incorrect. As required not same. product is (4) M ong I combination . - CHg Br J mechia CHg By my Charmgbr / in eine scene og en hoe 1 Hood, moc by CH3 Som (final product)

do Hence, op combination option (eg. 1,2 and (4) is 4 is correct. correct answer of see what ntained. Solutim 99:- Phantom Let see each conversion, and product is obtained. sunma By B - ether By mg Bra (React again nar v Hallo it a na 991 91919191.19 119 1p 1p PP pippppppppppppp Since , grignood reagent is more reactive - react again to give Alcohol.. Since, lls is not required product hence, he is incorrect. ether (2) car (CH (CHI CH2) Culi Sve ce ether) ved sv (Pentan-3-one) Gilmann reagent ((ens h) culi) less reactive their to grignard reagent and reaction stops here Clearly, o ? is incorrect, because our required pooduct is hexcha-3-one to

CEC - : Hg. Son Hoo, H₂SO4 . (3-hexanone) an hydration of Alkyne. mechanismi It is so you 32 H+ cion aut belegen in C (end) СИТ . 11 (3-hexanone ) So, only 3 is correet. i optim (6) 3 only is correct. non By drawing mechanism, We have seen only option (3) is correct. 1st reaction of is reaction of Acyl chloride with grignard reagent, and is with Gilmann reagent and grd is Hydration. Alkynes.
Please give me better rattings.

Thank you.