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.

1,681 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
-1
votes
0answers
34 views

What is the molecular weight of RBC (red blood cell) magnesium?

I'm trying to understand the results of a blood tests I received in mmol/l but the health literature I'm reading talk about mg/dL.. So far I was successful with all the values just by multiplying by ...
-1
votes
0answers
20 views

Porphyrin Wheel Dynamic Ligand System

In the synthesis of a Porphyrin wheel detailed at the end, the researchers where able to add another ligand (a heterocyclic ligand) to a Porphyrin holding a metal ion. How is this possible when the ...
-1
votes
0answers
51 views

Assigning priority to benzoyl groups

In naming the following compound; You choose the ring with the carboxylic acid because it has the higher preference than the benzoyl group, I presume. But I couldn't find the benzoyl group in any ...
-1
votes
2answers
38 views

How do you break down <10% H202 and <10% NAOH

I have a waste discharge that will generate 40 litres of <10% H202 and <10% NAOH at separate times. I have authorization to discharge to the sanitary drain, but I am concerned about degradation ...
-1
votes
1answer
123 views

Temperature required for E1 elimination reaction

I wanted to ask what's the temperature required for carrying out elimination reactions? Wherever I read about elimination reactions, they just mention that elimination reactions occur at high ...
-1
votes
1answer
14 views

Effect of pH on sulphur isotope variation on a landscape

I recently ran a forest regression model, this model showed me that increasing soil pH increases sulphur isotope variation across the landscape. I am not how this is possible and if it makes sense
-1
votes
1answer
55 views

Rate towards SN Ar reaction

In my organic chem notes,the following order for rate/ease of SN Ar reaction is given The reason given is The -I effect which stabilizes the carbanion so produced in the reaction. Turns out,my ...
-1
votes
1answer
275 views

ethanol and wax paper

With regards to making herbal tinctures with high-proof grain alcohol (ethanol), we store herbs in 151 proof vodka in mason jars for weeks, vigorously shaking them daily to extract the herbal ...
-1
votes
2answers
255 views

Phosphoryl bromide reaction with benzoic acid

I am trying to find out how $\ce{POBr3}$ reacts with $\ce{-COOH}$ group (benzoic acid to be specific). I found that it performs an elimination reaction with alcohols to give alkenes. I have also seen ...
-1
votes
1answer
48 views

Would the mixture of Latex Rubber and the Squid's chitin make a biodegradable plastic?

I don't know much of Chemistry but I put the chemical structures of each. Thank you!
-1
votes
1answer
106 views

Addition of aqueous KOH to 3-bromobut-1-ene

On addition of aq $\ce{KOH}$ to 3-bromobut-1-ene, substitution reaction should take place via $S_N1$ mechanism but in this an allylic carbocation forms which could rearrange. In that case which ...
-1
votes
1answer
50 views

Identifying weaker base

Can you tell me the reason behind the answer to this: Which is the weaker base? (a) o-cresol; (b) Trifluoro-o-cresol. Answer: (b) trifluoro-o-cresol. I'm not a student in any institution. So it's ...
-1
votes
2answers
856 views

Can we use (KBr + H2SO4) instead of (NaBr +H2SO4) in reaction with alcohol to generate alkyl bromide?

I have read somewhere that $\ce{H2SO4}$ is used to generate $\ce{HBr},$ and at the other place it is written that it is there to protonate the hydroxyl group. Which fact should I believe ?
-1
votes
1answer
468 views

Resonance effect of amide group

How will an amide group behave while being atrached to a benzene ring?Will it be donating due to lone pair of nitrogen or withdrawing due to carbonyl carbon?
-1
votes
1answer
105 views

Tollens' test with beta hydroxy ketones

My book mentions that 1,5-dihydroxypentan-3-one will not give silver mirror with diammine silver(+1): This seems very counter intuitive to me as the alcoholic group can be easily oxidized to the ...
-1
votes
1answer
175 views

Ranking basicity from a structure

I just came across this question in my revision. I selected (A) but the correct answer is (D). Could someone explain where I am going wrong? I is least stable --> most reactive --> most basic Cl is ...
-1
votes
1answer
514 views

Why is the carbanion resonance structure being used in the aldol condensation mechanism?

In the above mechanism's first step, what motivates the use of the carbanion resonance structure of the enolate ion if the negative charge is better localized on the more electronegative oxygen? Edit:...
-1
votes
1answer
2k views

What is the IUPAC name of this cyclopentadiene connected to a tertiary alcohol?

I got 2-(cyclopent-1,4-diene)-2-methyl ethan-2-ol.
-1
votes
1answer
211 views

Why can't you form an anhydride from an ester via nucleophilic attack?

The reaction referred to is the nucleophilic acyl substitution reaction, where the nucleophile is a carboxylate ion and the electrophile is the ester. I am having a difficult time visualizing why this ...
-1
votes
1answer
684 views

Friedel–Crafts with unsaturated halides

Which of the following compounds will not undergo Friedel–Crafts reaction with benzene: vinyl chloride or allyl chloride? According to me vinyl chloride will be a better electrophile than allyl ...
-1
votes
1answer
50 views

Fischer Projection

i'm confused of how to get the Fischer projection of the molecule on the top. i can see that the hydrogen and OH group are sticking out. However i don't understand how the CH2OH group is pointing ...
-1
votes
1answer
353 views

Which is more acidic - 3,5-dimethylphenol or 3,5-dimethyl-4-nitrophenol?

Does steric hinderance stops the benzene ring resonance?
-1
votes
1answer
215 views

Resonance structure and stability

Does the existence of resonance structures always translate as stability? I've been taught that resonance structures generally "spread out" charge in order to compensate for deficiency or excess of ...
-1
votes
1answer
1k views

Stability order of methy benzyl cations?

I know that meta position shown no resonance effect and hyperconjugation effect . So According to the order given I guess Hyperconjugating effect is taken into account as -CH3 has no Resonance effects....
-1
votes
1answer
977 views

Is cyclohexanol or hexanol more acidic?

If we had a hexane ring with an $\ce{OH}$ substituent vs. a hexane chain with an $\ce{OH}$ substituent, which of the two, if any, would result in a weaker conjugate base? My confusion: The ring ...
-1
votes
1answer
460 views

Give the order of nucleophilic addition reaction in the following -

I am confused that whether we should take only inductive or hyperconjugation effect also into consideration while finding the order. As the answer in the book is only according to inductive effect . ...
-1
votes
1answer
104 views

Sargassum seaweed affects porcelain?

We are inundated with Sargassum seaweed here in the Virgin Islands right now. It has a pungent sulphur odor as it decomposes. Coincidentally (or NOT) the porcelain tubs in the condos I work at are all ...
-1
votes
1answer
68 views

Can Hempcrete be an effective blocker of gamma radiation?

My basic question is if Hempcrete walls or blocks could potentially be effective against gamma radiation. Now I want to say no due to gamma rays being destructive against carbon material in general ...
-1
votes
2answers
7k views

What is the major product of bromobutane and sodium ethoxide?

I know that the it is SN2 reaction and $\ce{Br}$ is the leaving group. Second Carbon(from right side) is the beta carbon. As the $\ce{Br}$ group leaves, $\ce{OH}$ will create a bond with one of the ...
-1
votes
1answer
396 views

Why is the Diels-Alder reaction a syn addition?

It is said that the Diels-Alder reaction is a syn-addition with respect to both the dienophile and the diene. Is there a reason for that!?
-1
votes
1answer
40 views

Why is manganese oxide precipitated during the syn hydroxylation of alkenes with permanganate ion?

During the hydrolysis step, after the formation of the heterocyclic ring, hydrogen permanganate ion is formed but the final product is manganese oxide precipitate. My point - why would permanganate ...
-1
votes
1answer
319 views

When iodine replaces bromine in 2-bromobutane, does this lead to an overall lower energy level (electrons closer to nucleus) as well?

It seems to me that iodine is a nucleophile that replaces bromine because it has greater attraction to the carbon nucleus due to its electron properties. However, I thought that bonds are formed for ...
-1
votes
1answer
459 views

Why should hydrolysis break down fat into fatty acid and glycerol?

Fats and lipids are composed of carbon, hydrogen and oxygen. Both esters form different structures at different room temperatures. Now fats and lipids are generally insoluble in polar solvents(water)...
-1
votes
1answer
79 views

Why do we obtain racemic iodoalkane in nucleophilic displacement reactions?

In my textbook, the following statement is given : Attempts to prepare optically active iodides by nucleophilic displacement on optically active bromides using the iodide ion normally produces a ...
-1
votes
1answer
471 views

How does recrystallization work to purify if compounds have equal solubilities, but one is present in a greater quantity?

Every article or text I've read on crystallization states that it works by taking advantage primarily of differences in solubilities, but I've also been told that it can purify compounds with ...
-1
votes
1answer
696 views

Can hyperconjugation take place between lone pairs of an atom attached to an sp2 carbon?

When $\ce{HBr}$ is added to 2-chloro-2-butene, the proton preferentially bonds to the $sp^2$ carbon that's not bonded to chlorine. Does this mean that hyperconjugation takes place between the lone ...
-1
votes
1answer
2k views

Sulphonic acid group in benzene ring

Is the sulphonic acid group a benzene ring activating [ortho-para directing] or deactivating group [meta directing] ? My thought: As highly electronegative O atoms are attached, the sulphonic acid ...
-1
votes
1answer
5k views

How to balance equation of alcohol oxidation with potassium permanganate?

R-CH2OH(aq) + MnO4{-}(aq) --> R-COO{-}(aq) + MnO2(s) The above equation is the oxidation of a primary alcohol. The media is neutral to start out with, but the product will be basic*. From what I ...
-1
votes
1answer
1k views

Localised negative charge on phenyl carbanion

Why is the charge localised here: Image It has negative charge in conjugation π-bond. So, why resonance is not possible?
-1
votes
1answer
1k views

Determining the stability of four organic compounds given below

Answer given is a but how on earth is it possible because here one C Atom has 5 covalent bonds. Infact the aromatic character is decreased. I think c is correct because of resonance structure. But ...
-1
votes
1answer
478 views

Reactivity of phenols with carbonates

Why do phenols not react with carbonates? I read that stability and position of equilibrium have a part to play, but I can't seem to elucidate a rigorous explanation.
-1
votes
1answer
2k views

Why can't HCl be used in chlorination of alkane?

Is it because the HCl bond is strong or it is because we have to form HCl at the product side during the propagation step?
-1
votes
1answer
927 views

Apple Cider vs Apple Juice Chemical/Physical Properties in Relation to Milk

Why does non-alcoholic apple cider mix smoothly with milk, but mixing apple juice with milk causes it to curdle?
-1
votes
1answer
3k views

Single Point vs. 5 Point Calibration in HPLC

Single-Point calibrations aren't that useful for quantitative analysis and there is more room for error in result readings as compared to a 5-Point calibration. Is this why a 5-Point calibration is ...
-1
votes
3answers
148 views

Substitution Reactions; Stability of Carbocations

I was wondering which is more stable: a secondary carbocation or a primary carbocation that has resonance stabilization? I was reading through the organic chemistry text, it said that resonance ...
-1
votes
1answer
316 views

A problem on stability of carbanion

Determine the most stable of the two carbanions. I found second one as more stable because of inductive effect. But the given answee is first one.
-1
votes
1answer
208 views

Manufacture of p-nitroacetophenone

Is it feasible to manufacture p-nitroacetophenone by reacting di(p-nitrophenyl)cuprate and acetyl chloride? I think it should be possible but is there any chance that the NO2 being a highly ...
-1
votes
1answer
1k views

Sec-butyl vs Butyl - Alphabetizing and Ordering in Alkane Nomenclature

For the structure below, if we use trivial name for complex substituent, do we call it 5-butyl-10-sec-butyltetradecane, or 5-sec-butyl-10-butyltetradecane? Considering that both substituent are ...
-1
votes
1answer
60 views

Interaction of Tris HCl and EDTA with Nylon

I recently learned that we're storing some of our buffers that contain Tris HCl and EDTA in nylon containers. I can't find anything definitive but I have a suspicion that those components can ...
-1
votes
1answer
274 views

Counting the degree of unsaturation

What is the difference between a ring and an aromatic ring here (degree of unsaturation)? For a benzene molecule, they count it as four, so it seems like benzene contains a ring... but doesn't it ...