All Questions
Tagged with organosulfur-compounds organic-chemistry
52
questions
4
votes
1
answer
264
views
Identify the more acidic hydrogen in 1-(methylsulfanyl)propane-2-thione
This was a question that was asked in one of my exams, in which we had to confirm if the given order was correct or incorrect. The key says the given order is correct and the professor at my high ...
- 51
1
vote
1
answer
125
views
Why doesn’t the reaction between 3-mercaptopropionic acid and methyl iodide yield a methyl ester? [closed]
Problem
Answer
Question
I don’t understand why 3‐methylthiopropionic acid (X) is the correct answer. Wouldn’t sulfur and carbon have similar electronegativities?
As the consequence, isn’t it more ...
- 51
1
vote
2
answers
116
views
Mechanism of deprotection of enol thioether
I was reading some enolate chemistry from Carruthers textbook and came across the selective alkylation of unsymmetrical ketones. The reaction involves blocking one alpha-position of the ketone using ...
- 371
2
votes
1
answer
562
views
which is more acidic thiols or carboxylic acid?
According to me as the key atoms are different so when the h+ is released and each of them gets a negative charge as sulphur is a bigger atom compared to oxygen charge is more dispersed , hence the ...
- 41
2
votes
0
answers
102
views
Protecting Thiol group in presence of alcohol
What protecting group can I use that will protect the thiol in the presence of an alcohol? Is there a set of conditions, or a group that I can use that is selective to the thiol over the alcohol?
I am ...
- 21
3
votes
1
answer
281
views
Detection of Nitrogen and Sulfur in Lassaigne's Test
In Lassaigne's test for the detection of nitrogen and/or sulfur in organic compounds, we prepare Lassaigne's extract. In this extract, NaCN is formed if nitrogen is present, and $\ce{Na2S}$ is formed ...
- 39
0
votes
0
answers
67
views
Stable thioesters in biological millieu?
It seems that most thioesters are highly reactive in cells and blood due to the high concentration of biological thiols. Are there any derivatives of thioesters that are stabilized at physiological ...
- 137
7
votes
1
answer
475
views
Retrosynthesis of (2E)-1-(2,4-dimethylphenyl)-3-(thiophen-2-yl)prop-2-en-1-one
I am struggling to find a way to disconnect this molecule and I am unsure of the order:
First, I was thinking of disconnecting the C=C of the α,β-unsaturated carbonyl. Then for the thiophene group ...
- 73
3
votes
2
answers
139
views
Mechanism of Grignard reaction with 2-(thiiran-2-yl)oxirane
What will be the final major product?
The answer is 2-(methoxymethyl)-3-(substituted methyl)thiirane:
I think $\ce{R}$ of $\ce{RMgX}$ attacks thiirane ring because negative charge on sulfur is more ...
4
votes
1
answer
388
views
Absolute configuration of sulfur in phenyl styryl sulfoxide
Provide absolute configuration to sulfur atom.
I know that oxygen atom will get the highest priority by Cahn–Ingold–Prelog rule, but what about the next priority? I believe it should be phenyl, but ...
- 41
3
votes
0
answers
168
views
Is sulphonamide group prone to undergo diazotization?
I wonder if it is not a problem that there is another $\ce{-NH2}$ group in the molecule not connected to aromatic ring and if it can get protonated and react with $\ce{HNO2}$ too, in this case the one ...
- 31
1
vote
0
answers
68
views
phenolsulphonic acid
Phenolsulfonic Acid( PSA) is produced after sulphonation of Phenol at around 100 degrees. They use this product in tinplating.
Once a stable PSA is formed after sufficient reaction , unreacted ...
- 11
0
votes
2
answers
175
views
How to experimentally determine the elemental composition in fingernails?
I am doing a project in my highschool about analysing C/N and C/S ratio of finger nails of various ages and sexes.
Please suggest me a way to do this. I don't know where to start, I know the various ...
- 313
-1
votes
1
answer
273
views
A question about thiamine [closed]
How does the the nitrogen of thiazole in thiamine acquire a positive charge without being stabilized by another negative charge or by being a salt of an anion?
- 565
1
vote
0
answers
32
views
Acidity of 2-sulfopropanedioic acid in water
Sulfuric acid is a strong acid ($\mathrm{p}K_\mathrm{a}$ value below that of $\ce{H3O+}$: completely dissociated in water) at its first deprotonation, but is a weak acid ($\mathrm{p}K_\mathrm{a}$ ...
