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Questions tagged [alcohols]

For questions about saturated and unsaturated alcohols, their physical properties, their reactions, etc. For questions about phenol, use the [phenols] tag instead.

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Flash point change of Ethanol Water mixture [closed]

As all of us know practically that pouring more water in an Ethanol Water mixture means that it makes a higher flash point of the mixture. What is the chemical reason behind it? why does it not reach ...
Erhan Ertaş's user avatar
0 votes
1 answer
137 views

How does sodium react with methanol?

Strong acids of $\ce{AH}$ type readily dissociate to its constituent ions (considering the solvent is water): $\ce{A-}$ and $\ce{H+}$. But the mechanism of the reaction between sodium metal and ...
Chesx's user avatar
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-2 votes
0 answers
50 views

Can the reactivity of ethanol, ethanal, and ethanoic acid be related to its toxicity?

Ethanal (acetaldehyde) is more toxic than ethanoic acid (acetic acid) which is more toxic than ethanol (drinking alcohol). 0.7 ethanal LD50 oral g/kg 3 ethanoic acid 7 ethanol Can this be explained ...
SeanJ's user avatar
  • 107
2 votes
0 answers
38 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 ...
Maya H's user avatar
  • 21
7 votes
0 answers
130 views

Mysterious violet-purple compound in "Gerber Method" & "Banana oil synthesis"

During the determination of fat in milk (Gerber method), in a milk butyrometer are mixed milk + $\ce{H2SO4}$ 90% w/w + isoamyl alcohol (isopentyl alcohol) and heating. The acidic mixture separates ...
Stefano's user avatar
  • 89
0 votes
0 answers
58 views

What would be the correct IUPAC name of this compound? [duplicate]

How many carbon atoms will be there in the parent carbon chain? I have proposed its few names, which one is more appropriate? 4-Chloro-3-ethyl-2-(1-methylethyl)-butan-1-ol 3-(1-Chloromethyl)-2-(1-...
Dheeraj's user avatar
15 votes
1 answer
3k views

What happens if you carbonate ethanol?

The electronics youtuber bigclivedotcom has an on-and-off-again series where he carbonates various types of alcohol and comments on the taste. One thing he's noticed is that the stronger the alcohol, ...
David Given's user avatar
-2 votes
1 answer
177 views

Why does Methanol have a higher surface tension than Ethanol? [closed]

I am researching the surface tension of different alcohols and found something odd: the surface tension of Methanol was higher than that of Ethanol, which doesn't make sense to me. My understanding is ...
Woojin Rho's user avatar
3 votes
2 answers
389 views

Flash point of naptha and propanol

I filled a Zippo lighter with 2-propanol and it lit up easily when the ambient temperature was around 6-7 degrees Celsius. It was impossible to light it up when the temperature was around 3-4 degrees ...
flappix's user avatar
  • 139
-1 votes
1 answer
168 views

reaction of PCl5 with alcohol [closed]

I am able to think of two possible mechanisms for alcohol+PCl5 here, SN1 and SN2. In SN1, Inversion won't occur whereas, in SN2 inversion will occur. Which of the two is correct?
NNG's user avatar
  • 1
-1 votes
1 answer
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Why is Quinone used, while oxidising primary alcohols by Oppenauer Oxidation, instead of Acetone? [closed]

Usually, during Oppenauer Oxidation, while oxidising secondary alcohols, acetone solution is used with Aluminium Tertiary Butoxide. This results into the oxidation of secondary alcohol into a ketone, ...
Enormity's user avatar
0 votes
0 answers
19 views

Ion from unsaturated ether

As far as I am concerned, from unsaturated primary/secondary amines (enamines) we obtain imines, like we do obtain carbonyls from enols, by tautomerism. For tertiary enamines, we have a corresponding ...
MathStackExchange's user avatar
7 votes
1 answer
172 views

Why don’t Grignard reagants react with their alcohol products?

I’ve read that Grignard reagants react pretty quickly with alcohols and carboxylic acids to form their respective conjugate bases. I’ve also learned that Grignards can be used for the prepararion of ...
Allie's user avatar
  • 79
2 votes
2 answers
89 views

Protonation in acid-catalyzed nucleophilic attack of alcohol on carbonyl

When studying acid-catalyzed nucleophilic attack of alcohol on carbonyl, I got puzzled by the first protonation step. In textbooks, they often show that the first step is to protonate the carbonyl ...
AlojzyBąbel's user avatar
5 votes
1 answer
231 views

Mechanism for a reaction of reduced fluorophenol with BF3?

In the given question, $\ce{BF3}$ will act as an electrophile. Will it form $\ce{BF4-}$ and leave a positive charge on the carbocation to which $\ce F$ was attached or react with $\ce{OH}$. It will ...
Vansh Bhardwaj's user avatar
0 votes
1 answer
134 views

How did you convert primary alcohol using HCl (with ZnCl2)?

I kinda feel weird for this type of question. When primary OH (alcohol) is converted with HCl (with ZnCl2), how did the free Cl-ion come from? If, it is came from HCl, since when we get rid of the H ...
Nku's user avatar
  • 1
2 votes
0 answers
38 views

Feasibility comparison of symmetric ether synthesis and HCl + alcohol SN2 reactions

According to Solomons & Fryhle 10$^{th}$ edition Ch 11.8, Because the chloride ion is a weaker nucleophile than bromide or iodide ions, hydrogen chloride doesn't react with primary/secondary ...
chemN00b's user avatar
  • 328
4 votes
2 answers
180 views

Why does "bis-tris propane" have two pKa values?

Wikipedia gives two pKa values for "Bis-tris propane". What about bis-tris-propane gives this compound two pKa values where other compounds have only one? How am I to choose which pKa value ...
Nicholas DeMarco's user avatar
2 votes
1 answer
446 views

Can someone explain the chemistry around adding Isopropyl Alcohol to water contaminated gasoline - how does the IPA 'remove' water from the gas?

So there are many products on the market sold as fuel additives; some (like 'Heet' brand) are nothing more than 99.9% isopropyl alcohol in a nice package. When trying to understand how they work and ...
wild coast's user avatar
3 votes
1 answer
103 views

Does the ‘e’ from ‘-yne’ get dropped in compounds of higher functional groups?

What is the way of representing a triple bond in a compound of a higher functional group, like alcohol? Does the ‘e’ from ‘-yne’ get dropped like in the case of the ‘-ene’ suffix? For example, would ...
dotmashrc's user avatar
  • 375
3 votes
0 answers
35 views

How to calculate composition of alcohol/water mixture to achieve given concentration of alcohol vapors in air for calibrating a DIY breathalyzer?

I made a breathalyzer using a MiCS-5524 gas sensor. I would like to calibrate it so it can be close to accurate. e2v technologies — MiCS Application Note 4, Using MiCS Sensors for Alcohol Detection (...
Bill2k's user avatar
  • 31
-2 votes
1 answer
177 views

Oxidation of Methanol - how to write the half reaction

I am trying to write the half reaction equations for: $$\ce{CH3OH + O2 -> HCOOH + H2O}$$ The primary goal for me here is to find out which reactant is oxidising without using prior knowledge of ...
Lawrence's user avatar
  • 105
-1 votes
1 answer
71 views

Why is it not possible for water to directly attach itself to the alkene to form an alcohol in oxymercuration? What is the need for mercuric acetate?

When going through the preparation of alcohols, I came across the method of Oxymercuration-Demercuration. Now, after going over the reaction, I didn't understand the purpose of the mercuric acetate ...
Sahil Muhammed's user avatar
2 votes
0 answers
33 views

Which 1,2-methylene shift is more favourable in ring expansions where ring has substituents

In the above reaction, first the -OH group is protonated after which it leaves creating a carbocation intermediate as shown Now, ring expansion is a more favourable rearrangement, however there is a ...
Pravimish's user avatar
  • 171
2 votes
1 answer
48 views

What's a good high precision analysis technique (after GC) to measure trace isopropanol in water samples?

Looking to measure trace IPA content in water samples. Only GC I have access to doesn't take samples with water. Different columns not an option.
A. Anil's user avatar
  • 31
0 votes
1 answer
82 views

Is formation of cyclic carbonate from trimethyl orthoformate and vicinal aromatic 1,2-diol possible? [closed]

Hello, my question is, "is it possible cyclic carbonate formation between trimethyl orthoformate and vicinal aromatic 1,2-diol"
Sajad Khanlarkhani's user avatar
-1 votes
1 answer
150 views

How is Magnesium Ethoxide appropriately prepared, stored and used to dry ethanol?

I found many procedures vaguely describing the preparation of magnesium ethoxide from elemental magnesium in excess dry ethanol in the presence of I2 as activator (in absence of air), I also know that ...
Hans's user avatar
  • 1,065
7 votes
1 answer
162 views

Reaction between 1,2-bis(buta-1,3-dien-1-yl)cyclohexan-1-ol and potassium hydride in THF

Which product is formed in the following reaction? I am quite certain that we deal with an oxy-Cope rearrangement that works at room temperature, but I don’t know how to draw the product given the ...
Mäßige's user avatar
  • 317
1 vote
1 answer
58 views

How is the intermediate compound 2-chloropropan-1,3-diol is formed when hypochlorous acid is added to allyl alcohol in the preparation of glycerol?

The expected product is 3-chloropropan-1,2-diol since secondary carbocation is more stable than primary but it is not formed. I have surfed the internet a lot regarding this and none seems to be a ...
Nelly Ravenhood's user avatar
2 votes
0 answers
161 views

Can a hydroxyl group be attached to a triple bonded (sp hybridized) carbon?

Alcohols are defined as organic compounds containing one or more than one hydroxyl group attached to a sp3 hybridized carbon atom. And it is mentioned in the book I am referring to [errorless ...
IHaVeTeStToMoRrOw's user avatar
2 votes
0 answers
246 views

Why don't secondary alcohols react with HBr/HI via SN2?

In polar protic solvents, $\ce{Br-}$ and $\ce{I-}$ are considered to be very good nucleophiles. Now, here the solvent is alcohol which is polar protic. So, why don't secondary alcohols react with $\ce{...
user avatar
-1 votes
1 answer
62 views

How to synthesize 1,1,1-trichloro-2,4-dimethylpentan-2-ol from methyl isobutyl ketone?

Chlorobutanol can be made with chloroform and acetone in the presence of potassium or sodium hydroxide. Would it work with other ketones such as methyl isobutyl ketone to yield 1,1,1-trichloro-2,4-...
That Guy's user avatar
3 votes
0 answers
78 views

Acidification of a vicinal diol [duplicate]

The following is a question from Advanced problems in organic chemistry by MS Chouhan: The options given are: My initial thought was that this could be a pinacol–pinacolone rearrangement. However ...
Lost Anisole's user avatar
1 vote
0 answers
126 views

Comparison of boiling points between 2‐butanol and isobutanol

Which has higher boiling points among butan‐2‐ol (1) and 2‐methylpropan‐1‐ol (2)? I know that branching decreases the boiling points, but I want to know how position of substituents affects the ...
Erucix's user avatar
  • 127
1 vote
1 answer
193 views

Reduction of unsymmetrical ketones using BINAL-H (Enantioselectivity)

I am struggling with a problem regarding the enantioselectivity of BINAL-H for quite some time now. The reaction scheme shows the reaction with (S)-BINAL-H as it is observed plus the transition state ...
marsem's user avatar
  • 21
3 votes
1 answer
474 views

Does yeast, sugar and water really produce any noticable/significant amounts of methanol?

I just read this question on Quora about distilling during pre-industrial age, which reminded me about multiple discussions I have heard or read during the years about whether the fermentation process ...
d-b's user avatar
  • 217
-1 votes
1 answer
312 views

Where in the apartment to store isopropyl alcohol

I want to have some 99% isopropyl alcohol for cleaning purposes and I'm wondering where to store it since in my apartment I don't have a storage room or much space. I've read it needs to be air tight ...
pritzq's user avatar
  • 9
-1 votes
2 answers
154 views

Are intermediate bulk container units suitable for storage of isopropyl alcohol? [closed]

I'm working in water treatment construction and my boss is going to be stocking isopropyl alcohol (IPA). He wants to store the chemical in bulk, with amounts ranging from 5000 L to 10000 L in IBC ...
Imran Munir's user avatar
-1 votes
1 answer
864 views

Which is more acidic alcohol or ketone? [closed]

I have read about it and i found that the alcohol is more acidic, but isn't the conjugate base produced from losing the alpha hydrogen of the ketone more stable ?! The negative charge in this ...
Ahmed Hossam's user avatar
5 votes
1 answer
677 views

Should the principal carbon chain contain maximum number of functional groups or just the principal functional group?

My answer was the 6 carbon chain, i.e. the name would be 2-(2-hydroxyethyl)-4-methylhexanoic acid. But the given answer is the 4 carbon chain, i.e. the name would be 4-hydroxy-2-(2-methylbutyl)...
Righter's user avatar
  • 284
0 votes
1 answer
240 views

Selectivity in dehydration of isopropyl alcohol to diisopropyl ether

Can isopropyl alcohol be dehydrated by sulfuric acid to diisopropyl ether in a similar way as to how ethanol can? Is there a way to avoid or at least minimize the inevitable dehydration to propylene?
user avatar
0 votes
0 answers
374 views

Why 1-methylethanol is not preferred IUPAC name for isopropyl alcohol?

For the compound $\ce{CH3-CH(OH)-CH3}$ I propose two names: propan-2-ol and 1-methylethanol. Which is the correct name as per the IUPAC guidelines? According to Organic Chemistry by Morrison and Boyd, ...
Get_ Maths's user avatar
0 votes
0 answers
50 views

Solubility of multiple solutes and limits of solubility during freezing

I'm interested in modeling the freezing of solutions of water and I'm not really sure what happens in water after the solubility of a given material is reached. I know that as ice crystals form they ...
Jake's user avatar
  • 217
-1 votes
1 answer
100 views

What is the product when alcohol is added to carbonyl compounds? [closed]

How do we know if, on adding alcohol to carbonyl compound: nucleophilic addition reaction will take place or alcohol will take alpha hydrogen to form a carbanion and consequent aldol condensation ...
aaravm's user avatar
  • 9
1 vote
0 answers
43 views

Polarity vs Acidic Strength (Alcohols and Inorganic acids) [closed]

If $\ce{HI}$ is more acidic than $\ce{HCl}$ because less polarity in $\ce{H-I}$ makes it easier to donate $\ce{H+}$ ion thus increasing its acidic strength, how does more polarity in $\ce{O-H}$ bond ...
Aayush Dhungana's user avatar
1 vote
0 answers
40 views

How can we say that one reaction is faster than another if two conflicting factors are at play in both of them

While learning about the preparation of alkyl halides from alcohols by reacting them with hydrohalic acids, it was mentioned that the order of reactivity of different alcohols is Tertiary > ...
ErrorEliminator's user avatar
1 vote
1 answer
80 views

Would TFA be a strong enough acid to perform an SN1 reaction on alcohols?

The pKa of sulfuric acid, which is usually used to do this reaction is -3, but would TFA be sufficient even though it has a pKa of 0.5?
sweetandtangy's user avatar
-3 votes
1 answer
127 views

Why is Denaturated alcohol made poisonous? [closed]

I understand the need to denaturate alcohol, as to have a material that can be used for non-food products without the heavy alcohol beverage tax. So, adding a foul tasting bitter substance like ...
Juan Perez's user avatar
-1 votes
1 answer
123 views

Does Fischer esterification occur when mixing alcoholic drinks with lemon juice?

I would assume it does happen because the ethanol in the drink would be in an acidic environment because of the lemon juice and would react with the citric acid in it. But the thing is, how come we ...
zhoumingguang's user avatar
0 votes
0 answers
169 views

Major product in the reaction of alcohol with unsymmetrical acid anhydride

When alcohol reacts with symmetrical acid anhydride to form ester. We have the following reaction, But if the acid anhydride used is unsymmetrical how can we identify the major product? For example ...
Asher2211's user avatar
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