b) Taking suitable example write the mechanism of Mannich reaction.
The Mannich reaction is a versatile organic reaction used to synthesize β-amino carbonyl compounds. It involves the condensation of a ketone or aldehyde, a primary or secondary amine, and formaldehyde (or a formaldehyde equivalent) to yield a β-amino carbonyl compound. The reaction proceeds through several steps:
1. Formation of an imine: The reaction _______ _________ _________ ___ _______.
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a) In the following equilibrium, predict the direction of shift of equilibrium for each condition listed below:
i) Addition of
ii) increased pressure
iii) lowering of temperature.
b) Taking suitable example write the mechanism of Mannich reaction.
a) Define and explain a thermodynamically reversible process.
b) 0.25 mol of an ideal monoatomic gas undergoes isothermal expansion from a volume of 2.0 dm3 to 10 dm3 at 27 oC. Calculate the maximum work that can be obtained from this process.
b) What is reaction quotient and how is it helpful in determining the direction of a given reaction?
b) Define solubility product constant and derive the relationships between solubility and solubility product constants for salts of AB2, A2B types.
a) How will you perform following conversions?
i) Phenol to p-bromophenol ii) 1,3-dihydroxyphenol to 1-(2,4-dihydroxyphenyl)ethanal
b) Write the mechanism of Friedel-Craft’s alkylation. What are its limitations?