write the chemical equation for following named reactions:
(a) Reimer-Tiemann reaction
(b) Kolbe reaction
(c) Claisen reaction
(d) Knoevenagel reaction
(e) Willgerodt reaction
Kolbe's reaction is also called kolbe schmitt reaction . It is named after Adolph Wilhelm Hermann Kolbe and Rudolf Schmitt. This is also called carboxylation chemical reaction.
This reaction is particularly facile with di- and trihydric phenols. Thus 2,4-dihydroxybenzoic acid is obtained readily
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2-Position of pyrrole is more reactive towards electrophilic substitution than
3-position. Explain giving all possible resonance structures of carbocations formed. Explain.
Suggest the reaction that can best be used to prepare following ethers by Williamson ether synthesis
(a) CH3CH 2— O— CH= CH2
(b) 
How will you prepare the following ?
(i) 10 -Hexyne from ethyne
(i) Ethanol from ethyne
(ii) 3-Hexanone from 3-hexyne.
Explain Hell-Vollhard-Zelinski reaction. Also illustrate its synthetic importance.
write the chemical equation for following named reactions:
(a) Reimer-Tiemann reaction
(b) Kolbe reaction
(c) Claisen reaction
(d) Knoevenagel reaction
(e) Willgerodt reaction
| What are racemic mixtures? How are they obtained? Discuss one method of their |
| resolution. |
Draw cis and trans- isomers of 1,3-cyclobutanedicarboxylic acid. Comment on the dipole moment of these isomers.