Using FMO method explain why [1,3] sigmatropic rearrangement of protons in
alkenyl chain does not occur.
In the analysis using FMO method:
The C-H bond that is migrating is assumed to be homolytically split.
The resulting carbon free radical and the orbital of the hydrogen atom are involved in
________ _____ __________ _____ ___.
___ ______ _____ __________ __________ ________ __________ _______ __________.
____ _____ __________ _____ _______ _______ _____ ___ _________ ___ ________.
____ _______ _________ ____ __________ ____ ___ ____ ______.
______ __________ ______ _______ ___ _____ __________ ___ _______ __________ ____ ___.
____ ___ _________ _________ _________ ________ ___ _______ _______ __________ ______ __________.
______ ___ ________ _________ ______ _______ _______ _____ ______ ___ ________.
- Solved Assignments
- Study Notes
- Guess Papers
- Question Papers
✓ Unlock up to 60% of the answer
✓ No payment required
In the following pairs which of the carbocation is more stable and why?
i) NC – CH – CH2 +CH2 CH3 or NC - CH2 - +CH2 H2
sec. carbocation p – carbocation
ii) CH3 CH2 +CH - CH2 CH2 CH3 or CH3 (CH2)4 +CH2
sec. carbocation p – carbocation
Complete following reactions:
Write the product and indicate the type of reaction that is taking place in the following:
Reaction of primary amine, in presence of an acid, with carbonyl compound
gives an imine. The rate of reaction increases by an increase in acidity but
beyond a certain limit, the rate decreases with further increase of acidity.
Electron withdrawing substituents at carbonyl carbon increase its
reactivity towards nucleophilic addition reactions.
How would you prepare cis and trans alkene from alkyne? Give its mechanism.
In Wittig reaction, the methyl, primary and secondary alkyl halide can be used to
prepare Wittig reagent (ylide) but not tertiary alkyl halide.