What is the principle of microscopic reversibility? Explain taking the example of an addition-elimination reaction or a nucleophilic substitution reaction.
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Suppose that there is a mixture having a specific rotation of +75o and an enantiomeric excess of 60%. Find out the enantiomeric composition of the mixture.
Carry out the following conversions as indicated.
a) Fischer form to: i) Staggered and Eclipsed Sawhorse forms and
ii) Staggered and Eclipsed Newman forms
b) Flying wedge form to Fischer forms
Select the resonance stabilised cation and give reason for your answer.
Give any two applications of ORD and CD.
How are disubstituted cyclohexanes different from monosubstituted cyclohexanes with reference to the isomerism? Draw the two chair conformations for each of the following disubstituted cyclohexanes. Draw also the cis and trans isomers and indicate the more stable isomer.
i) cis-Bromo-1-methylcyclohexane
ii) trans-2-Butyl-1-isopropylcyclohexane
iii) cis-4-Ethyl-1-hydroxycyclohexane
Write the products formed in each of the following and give the mechanism.
What are the advantages and limitations of method of quasi-racemates?