profile-img
Sourav posted an Question
September 20, 2020 • 03:18 am 30 points
  • IIT JAM
  • Chemistry (CY)

It is saying due to sir there will be no reso on a.. but there is reso in ring?

2 Answer(s) Answer Now
  • 0 Likes
  • 2 Comments
  • 0 Shares
  • comment-profile-img>
    Boddu rama krishna best-answer

    due to steric hindrance in (i) less stable than two

    eduncle-logo-app

    it is saying no reso on A.. how can it be possible

    eduncle-logo-app

    Steric inhibiting resonance is abbreviated as SIR in organic chemistry .It inhibits resonance in any molecule by distorting the planar structure of the molecule which is essential requirement of a molecule to exhibit resonance

    eduncle-logo-app

    If there is two bulky group in ortho substituted compound the repulsion between them lead to send the gropu out of the benzene plain. Hence Resonance get stopped

    eduncle-logo-app

    sir. here isopropyl grp will be out of plane na.. but benzene ring will remain on plane. Here only reso is occurring on benzene ring.. how it will change resonin benzene ring then?

    eduncle-logo-app

    due to bulky groups repulsion in 1st compound loss its planarity results no resonance..

    eduncle-logo-app

    benzene ring will lose planarity?

    eduncle-logo-app

    only ortho is bulky...attached in benzene sourav..

    eduncle-logo-app

    but it is saying reso will not occur on A and occur on B?

    eduncle-logo-app

    when planarity lose stop the resonance

    eduncle-logo-app

    sir but isopropyl grp is not involved in reso with benzene ring na? so how any effect on isopropyl grp will affect reso?

    eduncle-logo-app

    https://youtu.be/iHX3npAkbOk

  • comment-profile-img>
    Priyanshu kumar Best Answer

    It is right na...In Ist one due to SIR there is no resonance

    eduncle-logo-app

    but sir there is no effect on ring na.. no reso happening is on ring.. so why there will be no reso

    eduncle-logo-app

    SIR makes the group attached out of plane and not the ring na?

    eduncle-logo-app

    sourav resonance nhi hoga....bs steric repulsion ortho grp ke wajah se unstable hoga

    eduncle-logo-app

    sir.. Resonance to ring mai ho rha hai na? SIR will make isopropyl grp go out of plane and not the benzene ring.. so how reso will be affected

    eduncle-logo-app

    Resonance effect nhi ho rha hai bs SIR se isopropyl grp out of plane chala jayega

    eduncle-logo-app

    sir dono mai reso same hai na? due to benzene ring?

    eduncle-logo-app

    sourav yha repulsion se stability compare kr diya hai...but agar acidity or basicity me aisa case aaye then you can compre this effectively

whatsapp-btn

Do You Want Better RANK in Your Exam?

Start Your Preparations with Eduncle’s FREE Study Material

  • Updated Syllabus, Paper Pattern & Full Exam Details
  • Sample Theory of Most Important Topic
  • Model Test Paper with Detailed Solutions
  • Last 5 Years Question Papers & Answers