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02:17
@Mithoron thanks. This makes it clearer to me
02:43
Hello.
 
2 hours later…
04:41
yesterday, by YUSUF HASAN
Can somebody provide an arrow-pushing mechanism scheme for the acidic hydrolysis of 1-methoxy-1,4-cyclohexadiene to give 2-cyclohexanone?
Everyone in the high school group is confused about this one. Any kind of help will be greatly appreciated. We are not able to figure out how the double bond is shifting.
 
1 hour later…
05:46
2
Q: Identify KNO3 and KH2PO4 at home

IchsanI am not expert in chemistry. I need to find a way to identify a $\ce{KNO3}$ and $\ce{KH2PO4}$ powder at home. I suspect the seller gave me the wrong powder. What is the easiest way to do it at home?

 
2 hours later…
08:03
Everyone's having an election
08:20
Sub to Pewdiepie
@Dante "2-cyclohexanone"? The 2 doesn't make sense.
2-cyclohexenone sorry*
aha
The last Bond shifting step is just to obtain a more stable product I suppose.
9
Q: What are the products of the reaction of 1-methoxycyclohexene with dilute hydrochloric acid?

RobChem When 1-methoxycyclohexene is treated with dilute aqueous hydrochloric acid, methanol is produced along with another organic product. Identify this product. Explain why methoxycyclohexane is inert under these reaction conditions. I don't understand why it isn't just a simple addition to...

According to this, the first step must be attack of H+ on the pi bond. But if I remember well, according to the previous problems I had solved, ether link broken before the H+ attacks the pi bond.
@Loong I guess the ether doesn't cleave in the first step because the solvent is polar protic which would promote SN1 mechanism and that would lead to a highly unstable methyl carbocation. Please correct me if I'm wrong.
08:53
What's going on here? I think that the neighbouring N is to blame
Will it be like, both the ketones will become alcohols and they'll form triple bond which will be reduced by LiAlH4 to double (because of the N nearby that could happen) and because that double bond is near an aromatic system it will get reduced again too
 
2 hours later…
10:29
@PolarBear I think an alpha-lactam as an intermediate may be involved
10:40
@YUSUFHASAN Could you elaborate?
@PolarBear you there ??
11:18
@PolarBear Well.. Out of the isolated ketone and amide,the amide is more nucleophilic,so H- should add there to form a coordinated organo-lithium complex(O-Li+) then,the NH2 could,via anchimeric assistance,remove the O-Li+ part to form an alpha lactam which will get hydrolyzed to an amide,and an amide with LiAlH4 will reduce to -CH2-NH2
Sorry.. I meant the ketone is more nucleophilic up there @PolarBear
This makes a little sense.
I couldn't find it on the internet!
@PolarBear Yeah.. I mean,I don't have anything better to offer than this....
When you love chemistry more than math
@Zerix U referring to me?
Nope. A general statement
11:29
Ohh.. Well it applies well to me anyway :-)
Though I guess you probably like chemistry more than maths
@YUSUFHASAN I knew it xD
@PolarBear corrected mech.
12:27
@AdvilSell This seems feasible!
 
2 hours later…
14:11
@loong are you here sir?
 
1 hour later…
15:36
@AdvilSell This looks very wrong
Also don't call anyone "sir" around here
@Mithoron Oh, not feasible then. I don't know what's right what's wrong. What do you suggest?
15:51
@PolarBear Dunno, at least amide anion as attacking group
Or maybe better a cyclic complex
16:13
@Mithoron ok mithoron ,sure i will not call anybody "sir" overhere
@Mithoron but why does it looks wrong to you ....can you please tell
amide nitrogen is rather bad nucleophile
@Mithoron okay
but I got a doubt then...
also formation of 3-membered ring needs good incentive
@Mithoron So how do you suggest that the reduction should take place,to make the product? I thought that the lactam can be made because a 3 membered rings are common in anchimeric assistance.. And it will quickly hydrolyze and break.. That's what I thought, anyway
@YUSUFHASAN yeah same here
16:19
Hydrolysis would make amine
in 2 position; instead of substitution with creation of amide anion
"This ring-size nomenclature stems from the fact that a hydrolyzed α-Lactam leads to an α-amino acid ".. From wikipedia @Mithoron ?
That was from the Lactam page
Yeah that's my point
Oh yeah.. Now I get what u r saying... Then I'm wrong
U say we have to make an anion,then?
@YUSUFHASAN I dont get it
??
The product we have made is wrong@AdvilSell.. Once the Lactam is opened,it will stop only at amine
@Mithoron is correct; this can't proceed this way
16:28
@YUSUFHASAN we get a amide once the lactum is opened ...or not??
No.. We get an amino acid.. We will also end up with a cooh group
@YUSUFHASAN ohh...you are hydrolysing the lactum isn't it now I get you...ok so we were wrong..:-(
@AdvilSell I your mech ^ you have breaking of ring with H- - it makes more sense
@Mithoron yeah, so is it correct ??
If lactam was made in first then maybe
To really know one would need some external confirmation, at least textbook
16:38
@Mithoron yeah , i agree
16:53
@Mithoron can you provide a mechanism for the above reaction ??
why does the double bond shift and that too in presence of H+ ??
It's tautomerisation - much simpler then above prob.
@Mithoron isn't tautomerisation changes keto to enol
??
But you get conjugated enol here
and it turns to conjugated ketone
@Mithoron Yeah , I am real studip man its was relly easy ..thanks :-)
 
3 hours later…
19:55
What should we do against such comments and answers:
-1
A: Nomenclature of an organic compound with benzene and double bonds

WaylanderAccording to Chemspider structure here it is 3,4-Pentadien-2ylbenzene

We already have it in our guidelines:
> You should also not rely on chemical catalogues (e.g. Sigma-Aldrich) or online databases (e.g. ChemSpider).
 
2 hours later…
21:45
2
Q: What would the chemical name be for C13H8Cl3NO

KalleMPFormula C13H8Cl3NO SMILES C1=C(C(=CC(=C1)Cl)Cl)N(C(C2=CC=CC=C2)=O)Cl I found the diagram on the left in a book and drew the one on the right using https://pubchem.ncbi.nlm.nih.gov/edit2/index.html And got the SMILES description from that. Any clues as to what might be an I...

22:21
@PolarBear the amide being reduced to an amine is normal with LiAlH4 and you should know the mechanism for that. The ketone being reduced to a CH2, though, is not normal. It has to do with the indole nitrogen participating in the reaction. There is no weird alpha lactam going on.
2
user image
5
I hope this is enough for you to figure out what's going on; if you need more elaboration, I suggest posting it as a question on main site.

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