Write the mechanism of the following reaction : nBuBr+KCN→EtOH-H2O nBuCN
Solution and Explanation
The given reaction is an SN2 reaction. In this reaction, CN− acts as the nucleophile and attacks the carbon atom to which Br is attached.CN− ion is an ambident nucleophile and can attack through both C and N. In this case, it attacks through the C-atom.
Top Questions on Haloalkanes And Haloarenes
- Which among the following halogen exists in liquid state at room temperature?
- CUET (UG) - 2024
- Chemistry
- Haloalkanes And Haloarenes
Write the structure of the major organic product in each of the following reactions:
(i)CH3CH2CH2Cl+NaI→acetone heat
(ii)(CH3)3CBr+KOH→ethanol heat
(iii)CH3CH(Br)CH
CH3+NaOH→water
(iv)CH3CH2Br+KCN→aq.ethanol
(v)C6H5ONa+C2H5Cl→
(vi)CH3CH2CH2OH+SOCl2→
(vii)CH3CH2CH=CH2+ HBr→peroxide
(viii)CH3CH=C(CH3)2+HBr→
- CBSE CLASS XII
- Chemistry
- Haloalkanes And Haloarenes
How the following conversions can be carried out?
(i)Propene to propan-1-ol
(ii)Ethanol to but-1-yne
(iii)1-Bromopropane to 2-bromopropane
(iv)Toluene to benzyl alcohol
(v)Benzene to 4-bromonitrobenzene
(vi)Benzyl alcohol to 2-phenylethanoic acid
(vii)Ethanol to propanenitrile
(viii)Aniline to chlorobenzene
(ix)2-Chlorobutane to 3, 4-dimethylhexane
(x)2-Methyl-1-propene to 2-chloro-2-methylpropane
(xi)Ethyl chloride to propanoic acid
(xii)But-1-ene to n-butyliodide
(xiii)2-Chloropropane to 1-propanol
(xiv)Isopropyl alcohol to iodoform
(xv) Chlorobenzene to p-nitrophenol
(xvi)2-Bromopropane to 1-bromopropane
(xvii)Chloroethane to butane
(xviii)Benzene to diphenyl
(xix)tert-Butyl bromide to isobutyl bromide
(xx) Aniline to phenylisocyanide
- CBSE CLASS XII
- Chemistry
- Haloalkanes And Haloarenes
Give the IUPAC names of the following compounds:
(i)CH3CH(Cl)CH(Br)CH3
(ii)CHF2CBrClF
(iii)ClCH2C≡CCH2Br
(iv)(CCl3)3CCl
(v)CH3C(p-ClC6H4)2CH(Br)CH3
(vi)(CH3)3CCH=CClC6H4I-p
- CBSE CLASS XII
- Chemistry
- Haloalkanes And Haloarenes
- Name the following halides according to the IUPAC system and classify them as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides:
(i) \((CH_3)_2CHCH(Cl)CH_3\)
(ii) \(\text{CH}_3\text{CH}_2\text{CH}(\text{CH}_3)\text{CH}(\text{C}_2\text{H}_5)\text{Cl}\)
(iii) \(\text{CH}_3\text{CH}_2\text{C}(\text{CH}_3)_2\text{CH}_2\text{I}\)
(iv) \((CH_3)_3CCH_2CH(Br)C_6H_5\)
(v) \(\text{CH}_3\text{CH}(\text{CH}_3)\text{CH(Br)CH}_3\)
(vi) \(\text{CH}_3\text{C(C}_2\text{H}_5)_2\text{CH}_2\text{Br}\)
(vii) \(\text{CH}_3\text{C(Cl)(C}_2\text{H}_5)\text{CH}_2\text{CH}_3\)
(viii) \(\text{CH}_3\text{CH}=C(Cl)\text{CH}_2\text{CH}(\text{CH}_3)_2\)
(ix) \(\text{CH}_3\text{CH}=CHC(Br)(\text{CH}_3)_2\)
(x) \(\text{p-ClC}_6\text{H}_4\text{CH}_2\text{CH}(\text{CH}_3)_2\)
(xi) \(\text{m-ClCH}_2\text{C}_6\text{H}_4\text{CH}_2\text{C(CH}_3)_3\)
(xii) \(\text{o-Br-C}_6\text{H}_4\text{CH(CH}_3\text{)CH}_2\text{CH}_3\)- CBSE CLASS XII
- Chemistry
- Haloalkanes And Haloarenes
Questions Asked in CBSE CLASS XII exam
- P.S. Public School, Aram Nagar has opened a gym for the benefit of students. As Sports Captain, draft a notice informing students about the facilities available in the gym, timings and other details.
- CBSE CLASS XII - 2024
- Letter Writing
- The RWA of Ganga Society, Pushp Nagar has planned to start free yoga classes for its residents. You are Sharmila Tiwari, the President of RWA. Draft a notice informing residents about the proposal, timing, venue and other details.
- CBSE CLASS XII - 2024
- Letter Writing
- You are Mr. Srikanth Sharma. You have recently built a new house in the hills of Uttarakhand. Draft a letter inviting your brother and his family to spend a few days with you in your new home. Include relevant details.
- CBSE CLASS XII - 2024
- Letter Writing
- You are Mr. Shyam Sundar, Professor of Psychology. You are invited by S.K.M. College, Mahboob Nagar to be the keynote speaker at its Annual Conclave on ‘Student Health – The Emotional Impact of Social Media.’ Draft a reply letter expressing your inability to accept the invitation and also cite a reason for refusal.
- CBSE CLASS XII - 2024
- Letter Writing
You are Neeta/Neeraj of Rainbow Nagar, Shaktiganj, a qualified basketball coach. You saw the advertisement given below and wish to apply for the position advertised.
R.J. Sports Academy
Requires Basketball Coach
Qualification: Master's Degree in specific game with NIS diploma.
Work Experience: Minimum 2 years in the relevant field.
Skills: Patience, empathy, leadership qualities, attention to detail.
Apply with complete bio-data to The Director, R.J. Sports Academy, 43, L.M. Square, Shaktiganj expressing your interest in the advertised post.- CBSE CLASS XII - 2024
- Letter Writing