organic chem
not a specific question doubt but a rather general one. to master organic chemistry do i need to know every reaction mechanism on tips ??
its pretty much impossible to remember mechanism of every reaction . for example hydroboration oxidation has a pretty long mechanism but crux is H (or D) from BH3 (or BD3) on more hindered carbon and oh (or od) on the other .
same goes for hydrolysis of ester , having two diff mechanism for acid and base catalysed
i do understand that reactions like pinacol pinacolone rearrangement have to be done by mix of logic and mechanism
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@Dexter
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.Another example is this rxn
ik R-NH2 with hno2 will just replace nh2 with n2+
after this its just removing n2+ and rearranging for most stable carbocation
so every time i come across this rxn i need to work my way up to R-N2+
sabke i dont think so is that imp a general idea would be really good though
which mechanism are worth remembering
pyqs surf kijiye jo apka repeadetly rxn dikhe unko smaj lo aur bich bich me revise karlo, aur jo kam dikh rhe unka general idea rakho
avoiding adv pyqs for now
eventually as mocks dene hai
adv ka idea nhi hai utna i wouldnt say here
but hn whatever it is pyq base rakho
Remember that R-NH2 + HNO2 gives R-N2(+)
The mechanism leading up to it is one that's simple enough to get because there's few things you can do in between to get the required product
But one exception
Secondary amines will stop at the -N=N-OH stage
yet to cover ig
amines nahi hua
Because there's no N-H bond
so the verdict is keeping a balance between both
In general rather than mechanisms per se, (except for some named reactions and ones that are way too crazy to even try and derive), get your fundamentals like curly arrow use and electron transfer down pat
ok so everytime i get R'-O(18)H + RCOOH i should draw those arrows and get to R'-O(18)-COR
and not jump to it directly
Unless R' is tertiary
Because then carbocation is favoured more
Iirc
You indeed can understand most of the mechanisms in jee level organic chemistry but yeah sometimes when it starts to get too complicated you can indeed leave it and skip ahead
Mechanisms favouring a particular type of product (regioselectivity) and the mechanisms involving some form of "rearrangement" are kind of a must to remember I'd say
Apart from that, knowing SN1/SN2/E1/E2 and some aromatic substitutions will suffice for most of your purposes
Having a general idea of how to identify electrophiles and nucleophiles and using that to predict where electrons flow is all that's required
And that comes with practice
Seeing a lot of reactions and trying to roughly sketch mechanisms of them (most of them!)
Curly arrows is what forms mechanisms though
Yeah, but you can figure out a lot of where those are supposed to go from things like potential differences and electron densities. That's what I meant.
Hmm I guess I'd agree
Potential differences though?
Didn't get what you mean by that?
Eh, I tend to end up using physics logic a lot of times. Greater the electron density, greater the electric potential, so more repulsion, electrons moving to a different region is more probable.
Yeah one could say that
The same could be rationalised with just saying "charges" as well but yes seems more precise
Well, you hardly see concentrated positive charges in organic chemistry.
And btw.... it's actually good if you try to explain chemistry using physics 'cause it's just that:)
I guess "partial charges" or potential difference would be a better term I agree
You good? @Varun_Arora thanks for inputs yo
i like to look at the mechanisms once while im learning for the first time
even if its long
yeah i do look and understand it once ofc
but organic is smthing that u have to keep revising regularly
and prac
so doing questions rapidly isnt possible if i write entire mechanism always
will close soon after going through it all once again
I think theres 2 phases to any chapters mastery, one is slow methodical problem solving
And after your done with basically half the pyqs than you should focus on speed
Till then its about familiarising yourself with everything
Thats how i look at it but someone can argue
i think this is one of the best thing i have read on how one masters a topic
Mastering a topic for an exam, yeah it pretty much sums it all up
true
+solved @Varun_Arora @Monishrules
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