Questions tagged [ethers]

This tag is for questions relating to ethers: compounds containing an $\ce{R-O-R}$ fragment. It can be applied to the synthesis of, synthesis from and properties of ethers. If one of the $\ce{R}$ groups noted above is a carbonyl group, use *esters* instead. If both are, *carbonyl-compounds* is appropriate. This tag should not be used if the ether functionality is minor compared to others, or if it does not take part in the reaction in question.

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2answers
39 views

Doubt in a question on cleavage of ethers (Solomons Practice problem 11.18) [closed]

I have reffered to the mechanism shown in the text which is: But I am not able to figure out how this took place: Please help me with it. Though it is a homework question but I have tried my best to ...
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Write the structure of the major alkene formed by the β-elimination of 2, 2, 3-trimethyl -3- bromopentane with alcoholic KOH [closed]

I cannot understand how to do the reaction with alcoholic KOH instead of sodium ethoxide and ethanol.
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Why is bimolecular dehydration not appropriate for the preparation of ethyl methyl ether? [closed]

The acidic dehydration of alcohols will give an ether, given the reaction conditions are appropriate for its preparation. For instance, ethanol when treated with H2SO4 at 413 K, yields diethyl ether. ...
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What is the reaction mechanism involved in the ring opening seen in 3,3-diphenyloxiran-2-ide?

I have an epoxide with a negative (-) charge on one of the carbons. In which of the two ways should I open the epoxide? I am not able to understand which one to prefer. (The general way I think of ...
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1answer
57 views

Which has higher priority between unsaturated ring and unsaturated chain in the nomenclature of organic compounds?

According to the IUPAC rules of nomenclature, alkenes have higher priority over rings but what if the ring also contains a double or a triple bond? For eg: Is this compound going to be named as 1-(2-...
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1answer
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Products of the reaction between ethoxyethene and HI

Problem The products formed in the reaction $$\ce{CH2=CHOCH2CH3 + HI ->}$$ are (a) $\ce{CH2=CHI}$ and $\ce{CH3CH2I}$ (b) $\ce{CH2=CHI}$ and $\ce{CH3CH2OH}$ (c) $\ce{CH3CHO}$ and $\ce{CH3CH2I}$ (d) ...
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1answer
50 views

Why is the ether linkage breaking here?

I have been asked to find the major product of the following reaction: This is my thought process: the lone pairs of the oxygen atom connected to $\ce{-Et}$ are less delocalised than the other oxygen ...
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What is the mechanism of benzyl ether hydrogenolysis?

The mechanism for the hydrogenation of alkenes or alkynes using Pd/C is fairly well explained to involve the absorption of hydrogen onto a metal's surface followed by the addition of that hydrogen ...
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2answers
387 views

What are the products formed in acidic hydrolysis of a tetrahydropyranyl ester?

Find the major product of the following reaction: My approach From my knowledge of reagents, I figured out that that the acid will protonate the oxygen(s) in the reactant and after that $\ce{C-O \...
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3answers
406 views

Synthesing tetrahydropyran from ethylene oxide

I thought that the first step must be using a Grignard reagent to add carbons, but I need a hydroxyl group on the carbon on the other side to make it a diol and produce the product given, but nothing ...
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1answer
90 views

Shape of PEG in water

According to the chemical formula $\ce{H−(O−CH2−CH2)_n−OH}$ of polyethylene glycol, or PEG, I assume that this organic compound has a long chain structure when it is dry and in powder form. (This is ...
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Reaction of multiple diols with sulphuric acid [closed]

Find the total number of possible products I can think of atleast three reactions that will take place in the acidic medium: Pinacol-Pinacolone rearrangement Intermolecular dehydration (leading to ...
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1answer
400 views

Why does H+ attack alkene first in this reaction?

The reaction is: Why is the double bond attacked here even though it is in conjugation with the lone pairs of O thereby making it harder to extract. Also,don't the 2 lone pairs on OH have more ...
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1answer
89 views

Acidic cleavage of an ether

In the following question; Apparently, an SN2 reaction ensues, where the iodine atom's supposed to cleave off with the less sterically hindered alkyl branch from both the oxygens. This is the ...
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1answer
61 views

Grignard alkoxide intermediate as starting material for ether or ester synthesis

I'm having a Grignard reaction between a ketone or aldehyde with RMgX in mind. The average workup uses water to hydrolize the intermediate alkoxide. But could this intermediate be used without ...
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1answer
302 views

A reaction of Hydrogen Iodide and Ether

The problem is: 1,2,3-trimethoxy-cyclohexane reacts with $x$ moles of $\ce{HI}$ to give $y$ moles of $\ce{CH3I}$ and iodo-cyclohexane as product. Then find the value of $\frac{x+1}{y+1}$. I am not ...
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1answer
47 views

Comparing between cleavage of ethers

We have to find out which ether would undergo cleavage faster. My Attempt IV. I couldn't figure out, so i carried out simple SN1 cleavage. Since +M effect of OH > OCH3 1st reactant seemed right ...
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1answer
176 views

Can Cyanide ion substitute methoxide? [closed]

Question Attempt Since CN is better nucleophile than both OMe and Cl, I believe that it should replace both. But none of the options match my answer. Where am I wrong? Please help.
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1answer
352 views

Effect of substituents on arene oxide-phenol rearrangement

When I was learning about the reactions of epoxides from my textbook, I came across the following mechanism for arene oxide-phenol rearrangement in the presence of acid: NIH Shift - National ...
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1answer
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The Evasive Ether: Existence of diethynyl ether?

I tried to find online whether the compound diethynyl ether, $\ce{HC#COC#CH}$, exists in a stable state at STP, mainly out of curiosity, but also because it would be interesting to study the ...
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1answer
644 views

Reactivity of different alcohols with NaNH2 and CH3I

Identify the final product (B) in the following reaction: I'm not sure how $\ce{NaNH2}$ and $\ce{CH3I}$ will react with the different types of alcohol present here. According to my solution,ether was ...
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69 views

Why can't strong bases cleave ethers?

I'm imagining a strong base like NaNH2 attacking the adjacent carbon of the ether, giving the oxygen a lone pair and forming an alkoxide. NH3 has a pKa of 36 while an alcohols (conjugate acid of ...
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Benzannulation of 18-crown-6

I know crown ethers can be used to complex metal ions. Question: What important properties do 18-crown-6 change during the benzannulation from 18-crown-6 to DB18C6 (dibenzo-18-crown-6)? How do these ...
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Do tertiary ethers tolerate oxidative workup of an ozonolysis reaction?

I am attempting to cleave a double bond into a carboxylic acid and carbon dioxide using an ozonolysis reaction followed by an oxidative workup. I am concerned with the presence of a tertiary ether in ...
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1answer
1k views

Reaction of ether with HCl

Most of the reactions undergo ring expansion whenever favourable. But this reaction [1, p. 514] doesn't seems to do so: Practice Problem 11.18 Provide a mechanism for the following reaction. Could ...
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How many ether metamers are possible for C4H10O?

How many ether metamers are possible for $\ce{C4H10O}?$ According to me, the answer should be 2 but it was given 3. I know 3 structures can be made: $$\ce{CH3—O—CH2—CH2—CH3}\tag{1}$$ $$\ce{CH3—CH2—...
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2answers
448 views

Acidic cleavage of ether with a 2° alkyl group

I know that an ether with a 3° alkyl group and a 1° alkyl group is cleaved by $\mathrm{S_N1}$ mechanism to give a tertiary alkyl halide and a 1° alcohol. And an ether with a two 1° alkyl groups is ...
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0answers
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What lubricant can be used for mechanical parts in a system containing diethyl ether?

I make a thermal actuator that works with the expansion of diethyl ether at its boiling point of around 34 °C. For sealing and lubrication of the polypropylene piston and barrel, I need a lubricant ...
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Is cyclic ether oxidised by periodic acid?

Is the three member ring of cyclic ether oxidised by periodic acid? As this also has oxygen attached to adjacent carbon so I think that cyclic ether of three members should be oxidised by periodic ...
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1answer
697 views

Role of zinc chloride in reaction of ether

I am trying to do a reaction between acetyl chloride $\ce{CH3COCl}$ with diethyl ether. I know that upon using anhydrous $\ce{ZnCl2}$ and heat, I'll get an ester and an alkyl chloride, but I'm not ...
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Which one is the stronger Lewis base: diethyl ether or tetrahydrofuran?

I am trying to understand Lewis bases (bear with me, I am a physicist). I was asking myself how diethyl ether and tetrahydrofuran compare with respect to their properties as solvents in electrophilic ...
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Ethyl Acetate and other Solvents in a mixture: miscibility and stability

I was wondering about a heterogeneous solvent mixture containing multiple alcohols such as IPA, Ethanol, methanol etc. Would EtOAc (Ethyl Acetate) play nice in these mixtures at low volumes such as 1 ...
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Using TBAI (tetra-butylammonium iodide) as a catalyst. Ideas on the mechanism or the driving force?

for my etherification of an alcoxide with alkylbromide I used TBAI as a catalyst. The catalyst transfers the alkylbromide into an alkyliodide which is more reactive. I was wondering, what is the ...
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1answer
29 views

Opening of ethers using acids [closed]

I got that following my solution i get the product is 3HCO2H but the given answer is 3HCHO
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1answer
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How to check leaving group ability of cations?

In the reaction of an ether with a hydrogen halide (HX), the positive hydrogen ion replaces one of the alkyl groups attatched to the oxygen; but why does this happen, isn't the hydrogen ion a better ...
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188 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....
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Deperoxidation of ethers via alumina: what happens?

I was reading about the procedures for the removal of peroxides from ethereal solvents, and a procedure which seems to have survived to our days is filtration through a column of "activated alumina" (...
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1answer
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Nucleophilic comparison of epoxides and ketones [closed]

Why does $\ce{H+}$ attack on epoxide and not on the double bonded oxygen?
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192 views

Are crown ethers “recycled”, typically?

I know that crown ethers have the interesting property of strongly complexing alkali metals, which allows them to be used in organic solvents (eg. as "dissolving-activity enhancing agents" for ...
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Claisen rearrangement in substituted ring

This is an example of Claisen rearrangement, property of allyl vinyl/phenyl ethers. I believe that the allylic migration should take place to the position ortho to both $\ce{-CH3}$ and $-\ce{OR}$ ...
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Properties of the products of styrene chlorification

Background: When chlorinating styrene with an electrophile two products can be formed by substitution of the benzene ring. That is because the ethylene group is ortho and para directing, from the +M ...
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1answer
2k views

How to acid-wash sand?

I need some acid-washed sand to smooth out boiling in diethyl ether synthesis. I aready have pre-washed sand for general filtration purposes, but it is not labeled as acid-washed. Unfortunately, I ...
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1answer
213 views

No.of isomeric ethers of formula C3H6O

I managed to get 3 ethers:- 1.4-member ring ether(Oxetane) 2.Vinyl ether 3. Epoxy ether This question was asked in my school exam and the teacher had given its answer as 4..Could anyone please tell ...
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Synthesis of Polypropylene glycol

Polypropylene glycol is produced by ring-opening polymerization of propylene oxide. The initiator is an alcohol and the catalyst a base, usually potassium hydroxide. When the initiator is ethylene ...
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1answer
218 views

What will be the product of this reaction?

We have an alpha beta unsaturated ether, along with a keto group in the same compound, which is being treated with a grignard reagent shown (assume the grignard reagent is in excess). Will it only ...
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1answer
5k views

What are the products of the reaction of methoxypropane with HBr?

The products of the reaction of methoxypropane ($\ce{CH3CH2CH2OCH3}$) with $\ce{HBr}$ are? In my opinion, the products should be: bromopropane ($\ce{CH3CH2CH2Br}$) + methanol ($\ce{CH3OH}$). The ...
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374 views

Mechanism for reaction of enol ether with HBr

Please refer to the image for the question. I tried two different mechanisms for the reaction (1 and 2) and ended up with two different products. Now I can't decide which of the two mechanisms would ...
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2answers
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Why are ethers treated as substituents and not as functional groups in IUPAC nomenclature?

Why are ethers not considered as functional groups in IUPAC nomenclature? Let us consider the following example: Image source The PIN for this compound is 2-ethoxy-1,1-dimethylcyclohexane. And we ...
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Why do alkanes have higher boiling point than their ether counterparts?

Based on my understanding of inter-molecular forces, I expect dipole-dipole interactions to be significantly stronger than van der Waal's interactions. Hence, I expect ethers (which obviously have ...
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1answer
33k views

Halogenation of Phenol [closed]

Why does only one $\ce{Br+}$ ion get generated in a non-polar solvent (such as $\ce{CS2}$), while more $\ce{Br+}$ ions are generated in aqueous or polar solvent (such as $\ce{H2O}$)?