Question

Can someone help me put these in order from fastest reaction to slowest. I tried, but i keep getting it wrong

Answer 1

sn2 reaction is favured by less steric hinderance and less substituted alkyl halides.now try to arrange again on this basis.i will help u get it right if u dont get it right this time on ur own

Answer 2

is it that ?

Answer 3

no.u still it wrong

Answer 4

can you explain it to me ? please?

Answer 5

just a minute

Answer 6

ok

Answer 7

shall i explain u the whole working principle o an sn2 reaction???

Answer 8

no, i understand that. Its just when i try to apply what i know to put those in order i get it wrong

Answer 9

the general order of reactivity of halides in an sn2 reaction is,
methyl halide>primary halide>secondary halide>tertiary halide
first check this criteria and then which molecule offers the least steric hinderance for attack of an nucleophile from backside

Answer 10

and label the compounds so i cud give the correct order for u

Answer 11

the correct order is 1>2>4>3

Answer 12

from fastest to slowest

Answer 13

yes

Answer 14

thats what i did the first time and it said its wrong ...i didnt put a pic up

Answer 15

i think its the right order

Answer 16

it says its wrong

Answer 17

i am sure about the fastest and slowest one.its the two in the middle which are bit confusing.fine then go with this order: 1>4>2>3
check it out

Answer 18

its right

Answer 19

why would it be 4, 2, 3?

Answer 20

great

Answer 21

3 is a tertiary halide so its the slowest one.
4 and 2 are secondary halides so we need to check the steric hinderance offered to the attacking nucleophile,and in this case 4 offered less hinderance

Answer 22

could u help with another question

Answer 23

ya.sure

Answer 24

I'm very unclean when it says to add the formal charge and idk if i should include the leaving group

Answer 25

may be u shud try the carbon atomfrom the opposite side as in an sn2 reaction an invertedproduct is formed

Answer 26

inverted product

Answer 27

u mean the carbon beside the carbon i put the arrow to?

Answer 28

r the lone electrons and the formal charges right?

Answer 29

i mean the carbon being attacked(from which br is attached)

Answer 30

u mean if i just have the row from the top, not the bottom

Answer 31

there shudnt be positive charge on oxygen
when br is alone,one more electron shud be on it

Answer 32

check it out

Answer 33

so the br should have a negative charge and two lone electrons , the O should be neutral and have 2 pairs of lone electrons

Answer 34

yes.that shud do it

Answer 35

still wrong

Answer 36

can i see the pic

Answer 37

what about other 4 lone electrons on br

Answer 38

sorry not 4 but 6

Answer 39

like that

Answer 40

ya.just like that.great

Answer 41

got it right.....if i have anymore questions today or tomorrow can i ask you ? It just that we have not done a lesson and i'm doing it with only reading the book and the notes

Answer 42

ya.no problem.never hesitate to ask anything.i will try my best to help

Answer 43

thank you

Answer 44

hey can u help

Answer 45

http://openstudy.com/study#/updates/52c9fd37e4b0095f1004bbd2