Questions tagged [halides]

Chemical compounds that contain halogens (group 17 in the Periodic Table) as part of their chemical structure. This tag should only be applied where the halide group is one of the main focuses of the question.

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Synthesis of para-chloroanisole using diazotisation followed by chlorination with aluminium chloride

Is this a legitimate reaction scheme to synthesise para-chloroanisole from benzene and methanol as the only organic reactants? $$\ce{C6H6 -> HNO3/H2SO4 -> H2/Pd -> HONO/{Ethanol}\\ -> {...
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Why are alkyl halides immiscible with water?

Why are alkyl halides, though polar, immiscible with water? I have tried to solve this question by myself and I believe that it's due to the large energy is needed to break the hydrogen bonds, which ...
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Why do electrophillic addition reactions (between hydrogen halides and alkenes) happen?

I understand that the type of solvent (protic or aprotic) may impact the rate of the reaction, but why doesn't the hydrogen just stick with the halide in the first place? I'm not sure if the reason ...
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In electrolysis, why is hydroxide oxidised in preference to anything(?) but halides?

In electrolysis of aqueous solutions, I can loosely explain what happens at the cathode in terms of reactivity - any metal more reactive than hydrogen stays in solution, effectively because they're ...
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CuCl via electrolysis of HCl

I need a solution of CuCl in HCl. Since CuCl reagent is such a pain to source and work with (because it oxidizes so quickly) I was thinking that I could create the solution simply via electrolysis of ...
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Isn't the mechanism of aqueous sodium hydroxide and 1-bromobutane involves both heterolytic bond fission and attacking by a nucleophile?

What is involved in the mechanism of the reaction between aqueous sodium hydroxide and 1-bromobutane? A. attack by a nucleophile on a carbon atom with a partial positive charge B. heterolytic bond ...
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Find the major products when these cyclohexenone bromides react with caustic potash in alcoholic medium:

Question: Also find the order of the rates of the given reactions. Answer: The answer of this question is given as option 'D' ie. all products are identical, however I am getting the answer as ...
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Why HCl is used in Lucas test?

In Lucas test $\ce{HCl}$ is used for acid-base reaction between $\ce{Zn(OH)Cl}$ to give $\ce{ZnCl2}$ and $\ce{H2O}$ which is kind of good because $\ce{ZnCl2}$ is formed again and used in first step ...
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What kind of conjugation occurs in in intermediate formed during SN2 reaction of allylic system?

I had read about the good reactivity of allylic systems towards SN2s. In SN1 there is stabilisation of intermediate carbocation through resonance. What kind of conjugation occurs in SN2?
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Will Chlorodifluoromethane (R22 refrigerant) react with calcium metal?

I am attempting to recycle or find a use for chlorodifluoromethane, however I do not want to risk venting it into the atmosphere or exposing myself to hydrofluoric acid. Ideally, I would like to ...
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Reaction rate of Mg with aryl halides

I have been thinking of the rate of reaction of aryl bromide and aryl chloride with $\ce{Mg}$ to form Grignard. When considering the electronegativities the carbon in aryl chloride is more ...
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How would one determine the yield of primary vs. secondary hydrohalogenation addition products?

For example, if I was to perform the following reaction: $\ce{CH3CHCH2 + HBr -> CH3CHBrCH3 + CH3CH2CH2Br}$ How would I quantitatively determine the relative yield of the primary and secondary ...
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Action of H2S and OH- on an alkyl halide?

What would be the action of $\ce{OH-}$ and $\ce{H2S}$ on 2,6 dichloroheptane? I came across this question in my organic chemistry workbook but I have simply never seen a question of this type before. ...
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Heating Dry Benzenediazonium Chloride

If we heat BDC with water then phenol is formed. I was wondering what would happen if we heated dry benzenediazonium chloride. I know that on heating benzenediazonium fluoroborate we obtain ...
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162 views

Wittig reaction with an alkyl dibromide

Recently, I have come across a problem, in which a ketone needs to be converted into an alkene. However, in the alkene product, there is also another bromide functional group, at the end of the alkyl ...
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199 views

In halogenation of ethene using bromine for example, why does the lone pair of bromine attack the C atom?

In the presence of the electron rich (pi bond) of ethene, the bromine molecule becomes a temporary induced dipole, one end being electron deficient and acting as the electrophile. (The pi bond in) ...
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Will a reverse osmosis membrane exclude perfluorobutanoic acid?

I recently did a water quality test and it showed a detectable level of perfluorobutanoic acid, a potentially dangerous carboxylate PFC. Will a reverse osmosis water purification system exclude this ...
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Why are only elemental halogens used in oxidation of thiols?

I know that purpose of molecular halogen like $\ce{Br2, Cl2}$ is to take away extra electrons on sulfur so that sulfur bridge can form. But can you use any other molecule beside halogen to do the same ...
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Percentage of yield reaction question

By bubbling $\ce{Cl2}$ in a solution containing $176.6~\mathrm{g}$ of $\ce{MgBr2}$ are obtained [sic!] $135~\mathrm{g}$ of $\ce{Br2}$. However, the yield of this reaction is not $100~\%$. How many ...

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