Questions tagged [organic-chemistry]

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. Always use this tag in addition to other more specific tags.

Filter by
Sorted by
Tagged with
0
votes
0answers
6 views

TEMPO Radical Analogue

After investigating what makes the persistent radical TEMPO stable, I was wondering if another compound which is more feasible for my needs would be comparable to it. Would oxidizing 2,2’-Dimethyl-...
1
vote
0answers
21 views

Hydroboration, steroselectivity and anti-markovnikov product [duplicate]

My first question has to do with the fact that Hydroboration produces an anti-markovnikov product, why?. I don't see how that happens. A wikipedia artical says that B has a partial positive charge ...
-1
votes
0answers
20 views

Dilution confusion

I have run into what I imagined would be simple mathematics, but it turns out I need some help. My problem is I have a bottle of Geobacillus stearothermophilus and the concentration of the spores is $\...
0
votes
0answers
15 views

Removing denatured Crystalbond?

I have some water-soluble crystalbond that is attached to silicon and, because of some overheating (to about 150 Celcius) during a final processing step, the crystalbond seems to have charred (white/...
-4
votes
0answers
21 views

How to find if a substance is Not equivalent to a mole? Assuming that substance exists in gas phase inside a closed container [closed]

Which of the following is Not equivalent to a mole of a substance? Assume each substance exists in a gas phase inside a closed container. A. 2.02 g of H gas B. 44.01 g of CO2 gas C. 14.01 g of N gas D....
0
votes
0answers
39 views

Does 3‐ethyl‐1,1‐dimethylcyclohexane have a stereocenter?

I knew that we have a stereocenter if the carbon is bonded to four different groups. According to the stereocenter rules, I should have $\ce{CH2}$ bonded to the carbon of the stereocenter (marked with ...
1
vote
0answers
35 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 ...
0
votes
0answers
14 views

Keto Enol tautomerism [duplicate]

I don't understand why the keto form is present more at equilibrium. Yes I know that for phenols or instances where the enol form can have H-bonding the enol form is preferred, but generally I have ...
-1
votes
0answers
25 views

Is (Z)-1-bromo-2-chloro-2-fluoro-1-iodoethene optically active or optically inactive? [closed]

Is (Z)-1-bromo-2-chloro-2-fluoro-1-iodoethene optically active or optically inactive? Need a solution of the given problem. My test says it is an optically inactive compound but there seems to be no ...
1
vote
1answer
32 views

Why is para-aminobenzoic acid more acidic than ortho-aminobenzoic acid?

Compare the acidic strength of o-, m-, p-aminobenzoic acids. I got that meta will be the most acidic as it won't be able to show R+ effect of $\ce{NH2}.$ But among the other two, i.e. ortho and para, ...
0
votes
0answers
14 views

Concentration of organic acids in lichens/rock substrates/soil (particularly oxalic and citric acid)

I am trying to design an experiment testing the efficacy of lichen acids to solubilize and mobilize nutrients from minerals in a lunar regolith simulant. My research so far indicates that oxalic acid ...
0
votes
0answers
35 views

3-propyl-penta-1,3-diene vs 3-ethylidene-hex-1-ene

From the rules that I know, I will name the above compound as 3-propyl-penta-1,3-diene because maximum number of functional groups (double bonds in this case) are in the five numbered carbon chain. ...
-2
votes
1answer
33 views

Why these compounds don't show and show Geometrical isomerism? [closed]

I was recently studying organic chemistry related to Isomerism. I have doubt based on an example that is, Why Cumulenes show GI? Why 1-chloro cyclohexene don't show GI?
-2
votes
0answers
17 views

Number of geometrical isomers that are possible in the following compound? [closed]

The number geometrical isomers are present in the given compound is ?
-2
votes
0answers
16 views

Factors Affecting Rates of Reaction [closed]

1-Bromopropane reacts with sodium hydroxide solution to give propan-1-ol. The hydroxide ions replace the bromine in the organic molecule: $$\ce{CH3CH2CH2Br + OH- -> CH3CH2CH2OH + Br-}$$ This is a ...
-2
votes
0answers
71 views

Which of the structures is more stable? [closed]

Please Explain me which of the following structures is more stable. Is structure (b) having cross conjugation? According to me, (b) should be more stable than (a) because free radical at primary ...
0
votes
1answer
28 views

What is the electrophile in Perkin's condensation reaction?

In Perkin's reaction, an aromatic aldehyde reacts with an acid anhydride to give an alpha-beta unsaturated aromatic acid. Which reactant is the electrophile and which one is the nucleophile?
-2
votes
0answers
18 views

How to achieve a homogeneous mixture of nutrients in all measurements of dog food? [closed]

I have obtained the minimum daily requirements for nutrients for my 2 dogs. I have a freeze dryer and I want to make my dog some food. Knowing the MDR for the dog how to I mix up the dog food so that ...
-4
votes
0answers
28 views

How to figure out the molecular formula of organic molecule formed from CO2 and H2O? [closed]

I am stuck with this problem for a few days now. I have the equation, $$\ce{C_xH_yO_z + O2 -> CO2 + H2O}$$ and data Mass of Sample (g) Mass of $\ce{CO2}$ (g) Mass of $\ce{H2O}$ (g) 0.5964 0.3048 ...
-2
votes
0answers
27 views

Bioorganic PKS Exam Revision

Hi all, going through exam revision for third-year Chemistry Exams. I'm coming up blank on some bioorganic questions on Poly Ketide Synthases. In the question it asks follows: 1)What post-...
-1
votes
1answer
34 views

how does sulphuric acid both be needed for hydrolysing and forming starch? [closed]

I apologize if the question sounds weird. I'm in grade 10, and we were doing esters for organic chemistry. one needs sulphuric acid as a catalyst for the formation of esters...apparently due to it ...
2
votes
0answers
34 views

Reaction pathway - Extra molecule used in one step only?

I am currently building a reaction mechanism through Gaussian calculations. I successfully found each TS and intermediates through the different jobs (opt, freq, irc) for my 3-step mechanism from ...
1
vote
0answers
20 views

Comparison of boiling points of para-derivatives of phenol

The boiling points of four para-derivatives of phenol are: How can we compare the boiling points of p-nitrophenol and p-aminophenol? Apart from the hydroxyl group, p-nitrophenol has two oxygen atoms ...
-3
votes
0answers
26 views

1H NMR Broad peaks for Ethyl Chloride in benzene d6

Why do we see very broad proton NMR lines for a sample of ethyl chloride in benzene-d6 saturated with oxygen?
-4
votes
0answers
23 views

How to count ratio of halogenation products [closed]

I am lost in one of my school tasks. task assignment is: Reactivity of groups CH3 : CH2 : CH1 is 1 : 4 : 5 during the chloration. Count (please tell me the procedure of couting the ratio) the ...
0
votes
0answers
18 views

steam distillation vs fractional distillation

I am a high school student and I am a little confused in the techniques used to purify organic compounds, for e.g we study in steam distillation we reduce the external pressure on the compound to be ...
-3
votes
1answer
36 views

Should I number substituent or double bond? [closed]

I am kind of confuse here whether to number $\ce{NO_2}$ or double bond in the ring.
-2
votes
0answers
14 views

Combustion Reaction [closed]

A Gaseous Hydrocarbon of 20ml is added with excessive Oxygen and combustion is done.After that the mixture of the gaseous product was 50ml.Then CaO was added and volume reduced to 10ml.What was the ...
3
votes
1answer
66 views

How to carry out cyclization of 1‐(2‐methylbutyl)‐2‐nitrocyclohexane?

How the cyclization can take place as there is no other functional group than $\ce{NO2}?$ One way that I can think of is photochemical bromination which occurs selectively at tertiary center which ...
-3
votes
0answers
20 views

Isn't methanol should turn blue litmus paper to red? [closed]

All alcohols are less acidic than water, but exceptionally methanol is more acidic than water, so I think that this certainly high acidity nature of methanol than water should result in a positive ...
0
votes
1answer
36 views

Calculation of concentration at equilibrium for extraction

The equation for equilibrium of solvent-solvent extraction is: $$\ce{PhOH(toluene) <=> PhOH (aq)}$$ An aqueous solution contain $\pu{1.5 \times 10^{-2} M}$ phenol and is shaken with the same ...
-1
votes
0answers
31 views

Does styrene react slowly or quickly with terephthalic acid (TPA) at STP?

The question asks basically if I put styrene in an environment at a certain (T,P) with terephthalic acid, which reaction mechanism will dominate and at what conditions? Styrene will normally react ...
1
vote
1answer
76 views

Are phenyl and allyl groups in prop-2-enylbenzene coplanar?

Wouldn't C1 and C2 in prop-2-enylbenzene be on the same plane as that of the phenyl ring, right? If the double bond connected to C2 was between it and C1, they would be, but is it correct that now ...
-2
votes
0answers
17 views

KMnO4 and Na2C2O4 solutions were used in the reactions that took place in a back titration to determine the amount of H2O2 in a sample [closed]

KMnO4 and Na2C2O4 solutions were used in the reactions that took place in a back titration to determine the amount of H2O2 in a sample. Calculate the concentration of H2O2 in the sample (w / v) as% by ...
1
vote
0answers
43 views

Why does allyl anion have only two resonance structures?

There are only two resonance structures of allyl anion with negative charge distributed over positions 1 and 3: $$\ce{\overset{-}{C}H2-CH=CH2 <-> CH_2=CH-\overset{-}{C}H2}.$$ What's the criteria ...
-2
votes
0answers
27 views

Nucleophilicity of ethanol vs ethoxide in protic solvents

what I know is, when comparing charged molecule like ethoxide with neutral one like ethanol both in protic solvent. The charged molecule is more solvated and that decreases its nucleophilicity. so I ...
2
votes
1answer
68 views

What is the IUPAC name of this organic compound? [closed]

Variety is the spice of life. I have made an organic compound myself. Can you please tell me the name? I thought that the correct answer is - 3,3-dibromo-2,4-dichloro-1,4-difluoro-2,4-diiodo-1-...
0
votes
0answers
26 views

Which electrons are in HOMO in a peptide bond?

We've recently studied the absorption of UV light by polypeptides, and found that the peptide bonds itself absorhs UV light at around 210nm. I'm confused about what feature causes this to happen.
8
votes
1answer
130 views

Why is quinone mono oxime more stable than 4-nitrosophenol?

When we do nitrosation of phenols, we get para-nitrosophenol as the major product, which tautomerises to quinone mono oxime. This article states that it largely exists in the quinonoid form. My ...
-3
votes
0answers
41 views

In NaI in Acetone why 2-chloro-2-methypropane react and Iodoethane doesn’t [closed]

NaI in acetone is a classic Sn2 reaction, So why does 2-chloro-2-methypropane react here?(slowly at 55 Celsius) 5) Apparently Iodoethane doesn’t react here. What might be going on?
-2
votes
0answers
13 views

what are effects of leaving group in SN2 in these allyl bromide and allyl chloride? [closed]

what are effects of leaving group in SN2 in these allyl bromide and allyl chloride? what are effects of leaving group in SN1 in these allyl bromide and allyl chloride?
-4
votes
1answer
31 views

What can I react with alcohol (sanitizing alcohol to be specific) to make a colour? [closed]

I want to make a small science experiment/prank, basically I need a substance that I can have on my hands, or put on someone else's hands, and when they sanitize their hands it leaves a color. The ...
-1
votes
1answer
50 views

Why is isopropyl alcohol (isopropanol) used in rubbing alcohol instead of 'regular' propanol?

Is isopropanol (or 2-propanol) a better solvent than ordinary propanol (or n-propanol, or 1-propanol)? This is strongly implied, from what I have read, but I can't seem to find a place that distinctly ...
2
votes
1answer
36 views

Reaction of 1,3-dimethyl-2,5-dintrobenzene with NaOMe/MeOH

I have looked through articles and closest I feel is in this question there will be a nucleophilic aromatic substitution. Now, a lot of questions are available where there is a halogen and OMe group ...
-1
votes
1answer
49 views

Halogenation of Octane with Chlorine gas

I have a question about the following Halogenation reaction: octane + chlorine gas -> ? The question is what are the possible products of this reaction, and which product would be produced in the ...
0
votes
0answers
22 views

Finding list of isomers of hexane, cyclohexane, octane, cyclooctane [closed]

I apologize this is not a core chemistry question. I am helping my daughter in her chemistry independent paper in grade 12 by putting together a database of hexane, cyclohexane, octane and cyclooctane ...
-2
votes
0answers
24 views

How can we determine which alkyl halide will undergo E1/E2(elimination) reaction? [closed]

How can we determine that which alkyl halide is supposed to undergo elimination-1 reaction and which one will undergo E-2 reaction?
5
votes
1answer
103 views

Mechanism of ring opening of amine combined with formylation

What is the mechanism for this reaction? The tertiary amine is converted into an amide and the ring gains a double bond. I can't figure out how the C-O double bond would be formed.
1
vote
1answer
92 views

Estimating BDE Values

I'm having trouble understanding how to "estimate" the value of the BDE for the compound shown below (I believe it is a secondary benzylic C-Br value) shown below (the 58 kcal/mol). We are ...
0
votes
0answers
23 views

How to decide the order of stability of allylic carbocations when comparing to benzylic carbocation?

I was going through my organic notes and found this order of stability of carbocation: 3° benzylic > 2° benzylic > 2° allylic > 3° alkyl I understand that all this is explained on the basis ...

1
2 3 4 5
173