Mechanism help
Not sure if I have got 2a but anyway need help with 2c.
Im not sure what mechanism is it. I tried nuc addition but i dont think thats right.
Cheers.
http://m.imgur.com/r7epDqE,QB0r94T,ouaR6K8
Im not sure what mechanism is it. I tried nuc addition but i dont think thats right.
Cheers.
http://m.imgur.com/r7epDqE,QB0r94T,ouaR6K8
my chemistry knowledge is rusty so sorry if im wrong
I pretty sure nucleophilic addition is correct, I've just done the mechanism and it matches yours so, just remember to put the partial charges on the relevant atoms.
I pretty sure nucleophilic addition is correct, I've just done the mechanism and it matches yours so, just remember to put the partial charges on the relevant atoms.
Original post by The Diplomat.
my chemistry knowledge is rusty so sorry if im wrong
I pretty sure nucleophilic addition is correct, I've just done the mechanism and it matches yours so, just remember to put the partial charges on the relevant atoms.
I pretty sure nucleophilic addition is correct, I've just done the mechanism and it matches yours so, just remember to put the partial charges on the relevant atoms.
But doesn't match the formula they have given in the question, I don't think? There is a carboxylic acid group?
Original post by Super199
Not sure if I have got 2a but anyway need help with 2c.
Im not sure what mechanism is it. I tried nuc addition but i dont think thats right.
Cheers.
http://m.imgur.com/r7epDqE,QB0r94T,ouaR6K8
Im not sure what mechanism is it. I tried nuc addition but i dont think thats right.
Cheers.
http://m.imgur.com/r7epDqE,QB0r94T,ouaR6K8
do you need help with this?
Original post by Super199
But doesn't match the formula they have given in the question, I don't think? There is a carboxylic acid group?
damn you're right
(edited 8 years ago)
Original post by The Diplomat.
damn your right
you're
it is nucleophilic addition
http://www.chemguide.co.uk/mechanisms/nucadd/reduce.html
right?
http://www.chemguide.co.uk/mechanisms/nucadd/reduce.html
right?
Original post by z33
Yeah I think so but I am messing up the mechanism..
You've 'attacked' the wrong C=O group. You need to do it to the one that is bonded to the methyl group. It reduces the ketone to a secondary alcohol, giving the CH3CH(OH)CH2COOH that the question asks for.
(edited 8 years ago)
Original post by z33
is this right?
is this right?
**** i attacked the wrong group x'D
2c is Nucleophilic addition.
The
- will attack the carbocation, provoking the double bond to the O to "Jump up" onto the O giving it a negative charge as well as a lone pair, the lone pair will then donate to a H+ from the NaBH4 to form a secondary alcohol (3-hydoxybutanoic acid).
The
- will attack the carbocation, provoking the double bond to the O to "Jump up" onto the O giving it a negative charge as well as a lone pair, the lone pair will then donate to a H+ from the NaBH4 to form a secondary alcohol (3-hydoxybutanoic acid).Original post by z33
fixed
Original post by GetOverHere
You've 'attacked' the wrong C=O group. You need to do it to the one that is bonded to the methyl group. It reduces the ketone to a secondary alcohol, giving the CH3CH(OH)CH2COOH that the question asks for.
What am I doing wrong now?
http://m.imgur.com/IhOI6vL
(edited 8 years ago)
Original post by Super199
What am I doing wrong now?
http://m.imgur.com/IhOI6vL
http://m.imgur.com/IhOI6vL
you forgot the OH
everything else is fine
check my mechanism against yours
look at the molecule in the question and the molecule you drew
Original post by z33
fixed
Original post by z33
you forgot the OH
everything else is fine
check my mechanism against yours
look at the molecule in the question and the molecule you drew
everything else is fine
check my mechanism against yours
look at the molecule in the question and the molecule you drew
Ah cheers.
Do you mind helping me with another question. How do you work out the number of structural isomers?
For example the question asks how many different structure isomere could be formed from the mononitration of 1,3,5-trimethylbenzene?
Thanks
Original post by Super199
Ah cheers.
Do you mind helping me with another question. How do you work out the number of structural isomers?
For example the question asks how many different structure isomere could be formed from the mononitration of 1,3,5-trimethylbenzene?
Thanks
Do you mind helping me with another question. How do you work out the number of structural isomers?
For example the question asks how many different structure isomere could be formed from the mononitration of 1,3,5-trimethylbenzene?
Thanks
Well there's no formula to work out the structural isomers
you just have to draw the molecule out and try to find the different combinations
check out this post
http://www.thestudentroom.co.uk/showpost.php?p=42748396&postcount=11 for more detail
Quick Reply
Related discussions
- Should I go for bachelors in Mechatronics Engineering?
- Where can I find AS mechanics Edexcel questions ?
- Aerospace engineering or Mechanical engineering
- Worried about studying Chemistry at UNI
- Mechanical engineering
- Mathematics Of Mechanics (yay)
- Studying mechanical engineering as an economic student
- Mechanics Tutor
- Mechanical vs general engineering
- chemistry will be the death of me
- a level biology and chemustry
- Mathematics modules
- Advice to University Applicants ?
- Organic chemistry learning a-level
- A level pure maths
- Stats and Mechanics
- Why is the Carbon always Delta positive in mechanisms?
- Should I switch from environmental to mechanical engineering?
- S6 Subject Choice
- What should I do to improve my grades in maths?
Latest
Trending
Last reply 6 days ago
Im confused about this chemistry question, why does it form these productsTrending
Last reply 6 days ago
Im confused about this chemistry question, why does it form these products
