Organic chemistry is a branch of chemistry that deals with organic molecules. Organic molecules generally have C-H or C-C bonds.

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Darkly colored by-products of esterification. What are they?

From this website, it says that 'failure to mix the liquids well will result in the conc sulfuric acid reacting to form unwanted darkly colored by-products.' In my esterification experiment of ...
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13 views

4 synthesis among which is best [on hold]

We have to synthesise 2 methyl 3 pentanone For that I propose 4 reaction Is I have done it correct If I am correct then Among this which is best.
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15 views

Most effective reaction [on hold]

Why in the following reaction butyl lithium is most effective first reagents . Why we cannot use KOH , sodium ethoxide or sodium acetate.
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0answers
18 views

Books for students [duplicate]

Can any one please suggest me books for chemistry . a book for practicing basicbasic problems and advanced problems , it should contain some solved questions. The books should contain all the main ...
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0answers
11 views

What is exocyclic compounds? [on hold]

please tell me about the exocyclic compounds and their physical state? I have tried to prepare the,m n but i am not knowing their end point where to stop the reaction so , please help me out.
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0answers
22 views

Mechanism of polymerization of 4-nitroaniline

Does anyone know the mechanism for/the structure of the product of the explosive polymerization of 4-nitroaniline with concentrated sulfuric acid? My guess is that it is some sort of aromatic ...
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1answer
16 views

Regioselectivity of pyridine for SnAr

Say there's a pyridine ring with leaving groups on the $\ce{C_2}$ and $\ce{C_4}$ atoms. Why would a nucleophile prefer to attack at the $\ce{C_4}$ position? They form very similar intermediates with ...
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1answer
22 views

Supramolecules in Spartan

Maybe someone here is familiar with supramolecules calculations using Spartan? I am new in this area and trying to figure out some things: First - what's the best way to draw them? I tried to draw one ...
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0answers
6 views

Electrophilic substitution on Cinnamic acid [on hold]

What is the orientation of Cinnamic acid during electrophilic substitution reaction? Ortho/para or mata?
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0answers
25 views

Nitric acid acting as oxidising agent

In the following mechanism, nitric acid acts as an oxidising agent to remove 2 H atoms from the intermediate (in the blue square) My first instinct if given only the reagents would be to protonate ...
3
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2answers
101 views

Does halogenation by PBr3 lead to an inverted product?

$\hspace{4.5cm}$ I think it follows the $\mathrm{S_Ni}$ mechanism and would not lead to Walden inversion, but the answer says otherwise. (the problem didn't indicate the presence of pyridine in the ...
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1answer
13 views

Nucleophile in a reaction [on hold]

How can we determine that in a compound which atom is a nucleophile in a reaction . I know we see resonance , but I am little confused between electronegativity , formal charge , solvent and size . ...
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17 views

Question on surface tension and adsorption

I just read that positive adsorption is observed with solutes which are hydrophobic when water is the solvent, and alcohol in water is given as an example (which was then generalized as polar organic ...
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35 views

Why are protic acids not used for the formation of thioacetals?

The standard procedure for protecting a carbonyl group as an acetal uses dry acid, such as $\ce{TsOH}$, but when forming a thioacetal, the Lewis acid $\ce{BF3}$ seems to be the catalyst of choice. For ...
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0answers
21 views

chemistry. please i need some help [on hold]

How many grams of HCL solution which is 73% by mass are needed to saturate 16.8 liters of propene at STP ? I would really appreciate any help. Thank you in advance
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1answer
35 views

Preparation of alcohols from Monosubstituted cyclic ethers [on hold]

Can methyl oxirane(epoxide) (a mono substituted 3 membered cyclic ether) form alcohols by reacting it with Grignard reagent? If yes, can you please explain the reaction with mechanism? If no, why?
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2answers
26 views

Does an axis of symmetry determine chiralty?

What I've understood about chiralty and elements of symmetry: A molecule that is not superposable on its mirror image is said to be chiral. Plane of symmetry: An imaginary plane cutting a compound ...
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1answer
22 views

Ring expansion and carbocation formation

If in a reaction the carbocation is formed outside the ring then why does the ring expansion does not happen as follows:
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1answer
19 views

Haloalkanes and E1, E2 reactions

In an E1 reaction, I understand that the base reacts with the hydrogen of the carbon which is next to the positive charged carbon of the cation (of an haloalkane), because this hydrogen is supposed to ...
3
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2answers
34 views

Zwitterions/IEP of glycine at pH 6? (Paradox?)

I am trying to understand an experiment: Some crystalline, solid glycine was solved in water and a pH=6 was measured (also calculable with $\mathrm{pH} =\frac{1}{2}(\mathrm{p}K_\mathrm{a1} + ...
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2answers
21 views

Will sulphuric acid react with water produced in an esterification process?

Sulphuric acid acts as a catalyst to catalyze the reactions of alcohol and carboxylic acid to form ester. Alcohol reacts with carboxylic acid to produce ester and water. However, as sulphuric acid ...
6
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1answer
78 views

Is these a pair of diastereomer or identical compound?

I attempted on this question (e) and found out that they are diastereomers, but the answer from the book is that they are identical. I worked out the configuration at each of the centres for the ...
0
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1answer
31 views

Superoxide dismutase of Mn (SOD)

I have a little problem with my paper about Mn superoxide dismutase. On this picture we have "B" behind the 3 OH ions, I really don't understand what is this. Where is this "B" from? Please, help me, ...
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2answers
542 views

Why is 2-methyl-2,3-pentadiene achiral?

2-Methyl-2,3-pentadiene is achiral. Why? Centre of symmetry Plane of symmetry C2 axis of symmetry Centre and Plane of symmetry. I've drawn the structure: So far I've ...
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Need IMF and gas laws help! [on hold]

Chemistry IMF and Gas Laws help.? 38. Frank performs the Gas Laws Lab and records the following data: mg(s) + 2hcl(aq) = H2(g) + MgCl2(aq) Mass of Mg: 0.064 g Room temperature 22°C Rooms Air ...
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1answer
24 views

Naming a tri-substituted amine [on hold]

Just came across this couldn't decide how to name it, anyone think they can give it a go? $\hspace{7cm}$
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1answer
25 views

Is it possible to quantify alkane branching? [on hold]

Is it possible to express the extent to which an alkane has branching (branch count)?
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Detect the all Enantiomeric, meso and diastereomeric positions at the above molecule? [closed]

![This is the structure of vitamin B12. please, I strongly need the answer of this question, thanks for any help.]1
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0answers
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Which compound has a higher rate of solvolysis in aqueous ethanol?

Among the following compounds I think D compound has more rate of solvolysis in 50% aqueous ethanol at 45 °C than compound C due to more resonance, but the compound C has more rate.
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0answers
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Why cis isomers give mesomers on syn addition? [on hold]

My book says that cis isomers of alkenes on syn addition and trans isomer on anti addition give mesomers. It also says that, cis isomers on anti addition and trans isomers on syn addition give racemic ...
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1answer
48 views
+50

Can ethyl acetate isolate cinnamaldehyde from cinnamon oil?

I recently watched a video on extracting cinnamaldehyde from cinnamon using dichloromethane as a solvent. I would like to attempt the process. However, I would prefer not to use haloalkanes because ...
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0answers
10 views

Mechanism of thyroid hormone synthesis: iodation and free radical formation

In the synthesis of thyroid hormone, what part of the thyroid peroxidase hormone is specifically responsible for abstracting the free radicals from the aromatic side chains in the iodated tyrosine ...
-1
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1answer
14 views

Drain cleaner on iodized salt reaction

I poured liquid heat brand drain opener onto iodized salt and didn't get a reaction? I think it's because the sulfuric acid is diluted. If so how can I remove the water or moisture from it?
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0answers
18 views

Substitution reaction of alkyl halide [closed]

If the reaction is PhCHO + SF4 I tried to make the compound , but i think I am doing something wrong . What's the mistake ]1
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29 views

Adding of isotope of hydrogen [closed]

If we have a propane and want to convert it into CH3CHDCH3 where D is deuterium. I tried by reacting it first with Br2/hv Then adding Mg/Et2O But now I stuck, how to proceed?
3
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1answer
48 views

Alkyl halide reaction

In the following the reaction , According to me the product should be compound (A) due to substitution reaction. But the product formed is the compound (B) , what could be the mechanism for the ...
2
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1answer
53 views

How to extract caffeine from coffee

To extract caffeine from coffee, I tried reacting it with baking soda to make tannins more soluble. I then put in salt to push caffeine out of solution. I saturated it with salt and then mixed the ...
10
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1answer
149 views

Can you have a meta stereocenter?

Imagine a compound such as 1,3-dibromo-1,2,3-trichloropropane. Since the first and third carbons are attached to four different groups, they are both chiral centers. Assuming that both of these ...
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2answers
25 views

Which single organic molecule has strong absorbance throughout the visible range?

Is there a single organic molecule that has strong absorbance throughout the visible range? For example a black dye that is based on a single molecule?
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0answers
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Freezing a compound to very low temperature [closed]

Does freezing organics compounds like vitamins alter them ? Even at very low temperature ?
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1answer
17 views

Is the equation of an aldehyde to a carboxylic acid in alkaline conditions correct? [closed]

The equation is: $$\ce{RCHO +2OH- -> RCOOH + 2e- + H2O}$$ If it isn't correct, then please explain.
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0answers
29 views

Organic Chemistry Exercise Book [duplicate]

An Organic Chemistry Book that has only exercises? Better with solutions so to see if the answer is correct. Even more better if there is a PDF version. The exercises I am looking for are exercises ...
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0answers
19 views

I'm trying to understand carbonate subscript

if carbon wants to give 4 electrons and oxygen wants to gain 2 electrons then where does the third oxygen come from? wouldn't that mean that you only need two oxygen atoms to take the 4 electrons ...
2
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2answers
29 views

How to transform an aliphatic primary amine to the corresponding nitro compound?

Could you suggest a reagent or procedure to transform an aliphatic primary amine to the corresponding nitro compound. I know this is a bit backwards of a request because the usual procedure is the ...
-3
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0answers
7 views

Dilution of a know solution [closed]

Would original 1.00M NaOH or diluted 0.200 M NaOH react more quickly with copper metal and why?
0
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0answers
14 views

Does chloral undergo Cannizaro reaction? [duplicate]

Chloral does not have an alpha hydrogen, so ideally it should undergo Cannizaro reaction. But I have found in a book that 'chloral does not undergo Cannizaro reaction, as it will be hydrolysed into ...
-1
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0answers
14 views

organic chemistry ( relative rates of bromination) [closed]

4 different aromatic compunds (Acetanilide, Anisole, Phenol,p-Nitro phenol) are reacted with bromine solution (in 90% acetic acid). phenol has the fastest reaction rate and p-nitro has the longest ...
-3
votes
1answer
52 views

Stability between cyclopentdiene compound

What will be the order of stability? According the me it should be : Cyclopentadienyl anion > Cyclopentadiene > Cyclopentadienyl cation because the order of stability is aromatic > non-aromatic ...
3
votes
1answer
97 views

Failed esterification of 1-butanol and ethanoic acid

I did an esterification experiment of 1-butanol and ethanoic acid. 30 mL of 1-butanol was added followed by 30 mL of ethanoic acid, and then 1.5 mL of concentrated sulphuric acid and some boiling ...
10
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1answer
280 views

When is Phosphorous a Stereocenter

My textbook says that in the above diagram that there is only 2 stereoisomers. I am guessing this is due to the stereogenic carbon atom and not due to the phosphorous atom which apparently isn't a ...