Question

the answers i circled are incorrect except for 13. i know 11 is d and 15 is a. can you please explain why these three are correct as well. can you give me the correct answers and explain why?

de motor and h ow w generation recognized disorder that can benefit from hippothy wy b o cice to which they were anached indiactive donation of electron density to the cationic center chan inductive removal of electron density from the w eb through hyperconjugation buth A and both Band D Cellen) What is the IUPAC me of the compound Scats : OBCHOD A) (235.453-chloro 3.4 dibrom y Theme B)(2R3S,4S)-3,4-dibromo-2-chloro-3-methylhexane C) (35.45 553,4-dibromo-5-chloro-4-methylhexane D) (2R 3R 4S)-3,4-dibromo-2-chloro- methythene (2 35.4R)-3,4-dibromo-2-chloro-3-methylhexane 13) Which of the following is a secondary halide? A) CICH2CH2C(CH3)3 B) CICH2CH2CH(CH3)2 C) (CH3)2CCICH2CH3 D (CH3)3CCHCICH3 E) CICH2C(CH3CH2CH3 14) What type of intermediate is present in the SN2 reaction of cyanide with bromoethane? Acarbocation B) free radical C) carbene D) carbanion E) This reaction has no intermediate. 15) Which of the following alkyl chlorides will undergo SN2 reaction most readily? A) 1-chloro-4-methylpentane B) 2-chloro-4-methylpentane C) 2-chloro-3-methylpentane D) 3-chloro-2-methylpentane E) 2-chloro-2-methylpentane B AC Ellen) 16) Which of the compounds below undergoes solvolysis in aqueous ethanol most rapidly? A) cyclohexyl bromide B) methyl iodide C) isopropyl chloride D 3-chloropentane E) 3-iodo-3-methylpentane

Answer 1

Seconday halide in which the halide is the en i's group attached to canbon atonm attached to two 2.carbon is atoms other casbon Among the A) Cl given options CH - C(CH)2 2 halide aaoup is attached to -Casbon cltcu-CH CH (CH)2 chlonide is atached to ear bon Ci carbon is the attached to eny which is Eme canlen onothar ona

3- caruon (a4)-6CH CHs 2. 2 Here - cl is attachud to 3-carlen w 2-Carbon (),C-CH Option D is Conect E CtCH C(CHb) CH CH3 2 2 carlron

15) Primary alkyl halides underge SN neaction most neadiy Awong 1- Cardon C-C-C-C-CH the given options - 4 14 14 CH3 1- chloro.y.methyl pentane halide has primasy alky is connect So, option A 2- carbon CH-CH-CH- CH3 не CH3 2-carbon CH CH-CH 2 CH CH3

2.-cal T HLC CH-CH-CCH Secondary alkyl halide 2-chloro-2 methylpentane 3-cardon CH3 HC-CH-CH-CH3 2 2 c l fertiary alkyl halide Hence, the answer is option A

II. positive chage Carbo cation has a carbon atom. On Alky houps atached to caabocation stabilige in the following order t + R CH, RCH< RC 3 CHS 2. alkyl gaoup electron dlonating in natute. where Alky ghoups are This is due to eftect Inductive Hyper conjugation (no bond heson ance)

Inductive effect Inductive effect can be dofined os pemanent displace ment of bonded electrons touwards mohe electhonegative atom CH3 -CH3 нC is electron deficient and it ataacts the bonded electshons towards it se lf and positive charge hence its is neduced aud stabiksd.

Hrer conjugalion is also called no bond nesonance Based en can explain carbo cation. this we the stabiliy of hgdrgens (alkgl houps) attached to a carbocation no then that caabocation Mone are is more stabilised grerconjugation onbital involves a C-C C-H bond, Sigma 1esonance in R-C-C-H R-C C-H H R-C C H R-C=-H T R H
hence, answer is option D.