Tagged Questions
Use this tag for questions relating to organic molecules and their properties (structure of organic molecules, spectroscopic properties, reaction mechanisms, stereochemistry etc). DO NOT use this tag as the only tag in your question, as this tag by itself cannot appropriately classify your question. ...
-2
votes
1answer
20 views
Which is more soluble in water ammonia or Sodium dodecyl sulfate
I've tried looking this up and can't seem to find the solubility of SDS if any one knows the answer I would really appreciate it.
Which is more soluble in water ammonia or Sodium dodecyl sulfate.
...
-1
votes
0answers
16 views
Charges on adjacent carbon in resonance
$$\ce{H2C=CH-CH=CH2 <-> H2C=CH-\overset{+}{C}H-\overset{-}{C}H2}$$
Is this a correct resonance structure? Almost all the books just mention this
$$\ce{H2\overset{+}{C}-CH=CH-\overset{-}{C}H2}$$ ...
2
votes
1answer
18 views
Why does nucleophilic aromatic substitution occur at C-2 and C-4 of pyridine?
In the following reaction of 2,3,4-tribromopyridine with sodium methoxide in methanol,[1] why are only the C-2 and C-4 bromines replaced with methoxy groups?
Why doesn't the bromine at C-3 also get ...
1
vote
1answer
25 views
Classification in Stereoisomerism
I was trying to understand stereoisomerism. I am having trouble creating a 'flow chart' of Stereoisomerism. While there are many sources available over the internet and books, I don't find a standard ...
0
votes
0answers
8 views
How to precipitate Urea in a blood sample?
I am trying to use IR spectroscopy to measure total protein in blood. Urea creates a interference in that range.
I thought about precipitating urea to reduce its interference but how can i do that?
-1
votes
0answers
10 views
1-3 Cyclobutadiene Resonance or no Resonance?
Does resonance occur in 1-3 Cyclobutadiene? There is π- π conjugation present in the system, however, unlike Benzene, the bond lengths are not equal, and the molecule is not a perfect square. Why? 
0
votes
0answers
16 views
Production of benzoic acid using chlorine
I've come across a question that says: Which of the following compounds can we use with excess of NaOCl in order to produce benzoic acid?
The compounds are:
isopropanol,
acetophenone,
benzhydrol
...
0
votes
1answer
39 views
C-4 oxidation of octanoic acid to 4-oxooctanoic acid
I am leading a project in which I am attempting to synthesize 4-oxooctanoic acid in a (mostly) biological pathway.
Currently, I have reached a dead-end. I have a way to create octanoic acid through ...
-1
votes
0answers
18 views
How to IUPAC name a cycloalkane when there are two different substituents on the same carbon.
For example if there was a Cl and CH3 off of carbon one and an ethyl off of Carbon 3 in the cyclohexane ring
-1
votes
1answer
25 views
Acidic nature of hydrogen in hydroxides linked to biphenyl
I thought that as option (d) has more number of double bonds in conjugation, it will stabilize the anion better . But the answer given is (c) .Can somebody please explain?
I tried to draw the ...
-1
votes
1answer
14 views
Can methyl halide be used in Wurtz reaction?
Yields of product(alkanes) are best for 1°(60%) and least for 3°(10%) alkyl halides. Can methyl halides be used in Wurtz reaction? Would it produce a good yield?
-1
votes
0answers
19 views
Oxidation of Graphite with HNO3 [on hold]
It is given in my book that nitric acid oxidizes graphite to either mellitic acid (Benzene Hexacarboxylic acid) or, with additional HF, graphite oxide. Can somebody suggest a mechanism for this ...
0
votes
3answers
94 views
Combustion analysis methodology question
I am questioning the answer key of an exam question my chemistry professor has given, because I think there is a flaw in the methodology of the exam answer. I have worked out my solution using my ...
1
vote
0answers
12 views
How does MP2 level of theory affect the natural orbital picture of the system?
I have performed CASSCF calculations for a series of molecules with varying input orbitals. I have used UNO, UHF, ROHF and MP2 based natural orbitals to perform the CASSCF calculations. For my system ...
-3
votes
0answers
28 views
Can someone please identify this compound and give it's IUPAC name [on hold]
we have to identify which compound this is and also give it's IUPAC name can please someone help me out.
0
votes
0answers
10 views
Calculating Empirical and Molecular Formulas Using Percentage Composition [on hold]
I have been given the following question in an organic chemistry homework and am having some trouble (I think I have correctly answered part (a) but am not quite sure).
An organic compound, X, has ...
-1
votes
0answers
22 views
Why BrCH2COOH is more acidic than ClCH2COOH?
I am unable to understand why BrCH2COOH is more acidic , since Chlorine is more electronegative than Br and also the position is same. Can anyone explain me the reason ?
-1
votes
0answers
27 views
Electrophilic addition
For this molecule :
reaction:
Why is there no addition of H and Cl atoms across the carbon double bond when Hot excess HCl(aq) is added?
Thanks
1
vote
0answers
40 views
Can an EWG behave as an EDG and vice versa?
Can an Electron Withdrawing Group(EWG)(like NO2, F, Cl, OH, etc.) behave as a Electron Donating group(EDG) in a compound where a carbocation is present in order to stabilise it?
Does the position ...
-1
votes
0answers
22 views
Strength of anions bonds
Why is the strength in anions like BH4- stronger than the strength of bonds like BH3? Is it because the electronegativity difference between the B-H in BH4- is smaller than the electronegativity ...
0
votes
0answers
21 views
Mechanism for the oxidation of a secondary alcohol (with acidified KMnO4.
I'm doing an experiment soon where I have to oxidise 2-heptanol to 2-heptanone. The first part of the experiment involves a work up wherein I have to first add acid then my potassium permanganate ...
0
votes
0answers
10 views
What is the relationship between food chemistry and coffee industry? [on hold]
I want in future to develop my family's Coffee, So it provides a specialty coffee in our country and its the only coffee that provides this service.
0
votes
0answers
17 views
Converting phenol to para-nitrophenol via nitrosophenol
Our class 12 text book says that if we treat phenol with mixture of concentrated $\ce HNO_3$ and $\ce H_2SO_4$, instead of nitration, the ring is oxidized to quinone.
So, the book proposes that we ...
0
votes
0answers
19 views
Bishydroxy ethyl terephthalate precipitation in Minimal media
Please how can I avoid precipitation of Bishydroxy ethyl Terephthalate solution while trying to make a culture media with it as a sole carbon source in an M9 minimal growth medium.
Is there any media ...
-1
votes
0answers
14 views
Organic polymer surface reaction with other chemicals [on hold]
Three questions about organic polymer surface and its interactions with other organic compounds.
I have a organic polymer surface with the functional group : C-O-C epoxy group
Now I am curious if ...
-1
votes
1answer
32 views
Converting a thioester to an amide
What reagents can I use for the following transformation? I think this has something to do with formation of an iminium salt and reductive amination, but I'm not so sure.
2
votes
0answers
28 views
What do cannabinioids have in common structurally?
I'm looking at the wikipedia page for cannabinioids, and trying to find structural similarities between them. For plant based ones it's hard enough, the only similarity I could find seemed to be 6 ...
1
vote
1answer
27 views
Oxymercuration demercuration, PCC, NaCN/HCl reaction
In this reaction of the alkene, the correct answer is below but I don't understand why it goes to that. This is my thought process - reagents 1 and 2 do oxymercuration demercuration and makes a ...
0
votes
0answers
19 views
How does lemon juice make removing chewing gum from surfaces become easier? [on hold]
You know how one of the common ways to remove chewing gum is to apply lemon juice or vinegar. Can you please explain to me the chemical explanation behind it?
2
votes
0answers
61 views
Major product of isomerization reaction
I am trying to come up with a logical mechanism for the following transformation, where 2-methylenecyclobutan-1-ol is converted to cyclopentanone under acidic conditions:
What I have tried to do was ...
-1
votes
0answers
29 views
Arrange these compounds in the increasing order of Acidic strength [on hold]
These are some compounds for which the order of acidic strength is need to be determined.
I started by following the series of acidic strength as
Sulphonic Acid> Carboxylic> Carbonic> Phenols> ...
1
vote
0answers
29 views
Role of Ag2O in Wolff rearrangement [on hold]
In Wolff rearrangement, what is the role of $\ce{Ag_{2}O}$ in migration of alkyl/aryl group?
-2
votes
1answer
34 views
Vinyl vs Acryl IUPAC Usage [on hold]
I have read that the word Vinyl and Acryl, both refer to the same group.
The difference is that Acryl is used for naming when the functional group attached itself contains a carbon atom while Vinyl ...
-1
votes
1answer
30 views
Why does 1,3-dichloropropane not show stereoisomerism?
It is a multiple choice question:
Which compound does not show stereoisomerism?
A 1,2-dichloroprop-1-ene
B 1,2-dichloropropane
C 1,3-dichloroprop-1-ene
D 1,3-dichloropropane
I ...
0
votes
0answers
20 views
Reaction of 2-methoxyphenol with KOH and CHCl3 [duplicate]
I think that as the reaction is like Reimer–Tiemann reaction, ortho must be a major product. Please comment.
0
votes
1answer
31 views
Drawing Double Newman Projections [on hold]
How can I draw double Newman Projections by looking at the chair conformation of cyclohexane?
-1
votes
0answers
17 views
Conjugation in organic compounds [closed]
What is the meaning of conjugation?
I know that is single double bonds
but I want to know more about it and it's effect in the compounds
0
votes
0answers
9 views
Principles of NIR materials, books and artictle recommendation [on hold]
Good day!
Im gonna start to work on NIR paintings and Im curous about that somebody can recommend books or articles about the principles of the molecular structure ...
1
vote
0answers
31 views
Addition of NaBH4 and LiAlH4
NaBH4 and LiAlH4 will be a source for the hydride ion and reaction will begin with addition of hydride by displacing the carbonyl group.
But I am not sure will it attack both the carbonyl or only one....
0
votes
0answers
12 views
write the redox half reactions. Which is the reducing agent and oxidizing agent in the reaction what do the terms mean? given.. Mg+O---> Mg+ +O2- [closed]
write the redox half reactions. Which is the reducing agent and oxidizing agent in the reaction what do the terms mean? given..
$$\ce{Mg + O -> Mg^{2+} + O^{2-}}$$
-1
votes
0answers
8 views
What is delta H and delta S for the attachment of alcohol to silica gel [closed]
What are delta H and delta S for the attachment of alcohol to silica gel
-1
votes
0answers
16 views
find specific density and specific gravity [closed]
A box measuring 3.7 m x 3.2 m x 1.4 m is filled to the top with a broken substance, giving it a total weight of 45,842 kg. The empty box weight is 545 kg. If 110 imperial gallons of water can be ...
7
votes
3answers
147 views
+50
How does ring size affect SN2 reactions?
Suppose we have to compare the $\mathrm{S_N2}$ reactivity order for cyclopropyl and cyclopentyl chloride. How can we do that?
I think that cyclopentyl should be more reactive towards $\mathrm{S_N2}$ ...
-2
votes
0answers
28 views
Why compounds are colored and others not? [closed]
Any compound is colored if it contains chromophore groups such as $\ce{NO2}$, $\ce{NO}$, double bond.
Why are these groups responsible for the color and what are they doing?
-1
votes
0answers
23 views
Distinctive smell in California particularly on clothes/fabrics/toys/enclosed areas. What is it actually? [closed]
I hope that someone could relate to this kind of smell. I know it's chemistry but it is a little hard to know what this smell actually is and what causes it to smell like this. So here we go...
I am ...
-1
votes
0answers
23 views
Can the structure of this drug (olanzapine) chelate with Technetium-99m? [closed]
What are the possible ways in which this structure can form a chelation?
0
votes
0answers
40 views
Selectivity of aldol in base catalysed medium
Now this question has troubled me for quite some time.
I know about the reason B is formed in acid catalysed medium. But why is A major in base catalysed medium? According to me with weak bases like $...
0
votes
0answers
34 views
Nitrogen Inversion
Is anyone out there skilled at measuring barriers to nitrogen inversion? I haven't done it before and I have a few compounds I would like to study. I will take references, suggestions, you name it. ...
-1
votes
0answers
25 views
Why carbonyl has intermolecular force with NH or CH2 but not oxygen [closed]
Suppose I have the above substance. When the arrowed position is NH or CH2, it can bind to carbonyl of Ala-113 of thermolysin better than when it is O. Why is that?
I think it is related to dipole-...
0
votes
0answers
40 views
Number of molecules change with volume? [closed]
I just have a quick question. In my textbook I have found this question. I worked it out and got the correct answer because of how many similar questions like these I have done but I don't understand ...
