Session 2 - AR/SR Difference in Kuch Kuch Hota hai - Page 3

Originally posted by: Pocahontas

🤣.....When can i join this class, Professor Monar?

Originally posted by: Pocahontas

Professor,

I think R is a carboxylic acid and S is an alcohol. Their combination will give us esters with a nice fruity smell and that is the reason most of the students are inebriated by their chemical reaction.

Originally posted by: monar

Oh great analysis.👏👏 poco you joined V and D on commendation board 😃

R is carboxylic acid and as it tends to form dimers, S have to very careful before R evaporates 😉

Fischer esterification for SR

The classic synthesis is the Fischer esterification, which involves treating a carboxylic acid with an alcohol in the presence of a dehydrating agent:

R¹COOH + R²OH R¹COOR² + H₂O

Strong acids, typically sulfuric acid, catalyze this reaction. Many other acids are also used. Esterification is highly reversible. The yield of the product may be improved using le Chatelier's principle:

• using the alcohol in large excess (i.e. as a solvent),- S has to be in excess and everywhere as R is very strong.
  
• using a dehydrating agent. Sulfuric acid not only catalyzes the reaction but sequesters water (a reaction product). Other drying agents like molecular sieves can also be used.
• removal of water by physical means such as distillation as a low-boiling azeotropes with toluene, in conjunction with a Dean-Stark apparatus.

Originally posted by: Pocahontas

Thank you, Professor!😳

Mera gold medal kahaan hai? 😔

This is the process that i recommend:

Fischer esterification for SR

The classic synthesis is the Fischer esterification, which involves treating a carboxylic acid with an alcohol in the presence of a dehydrating agent:

R¹COOH + R²OH R¹COOR² + H₂O

Strong acids, typically sulfuric acid, catalyze this reaction. Many other acids are also used. Esterification is highly reversible. The yield of the product may be improved using le Chatelier's principle:

• using the alcohol in large excess (i.e. as a solvent),- S has to be in excess and everywhere as R is very strong.
  
• using a dehydrating agent. Sulfuric acid not only catalyzes the reaction but sequesters water (a reaction product). Other drying agents like molecular sieves can also be used.
• removal of water by physical means such as distillation as a low-boiling azeotropes with toluene, in conjunction with a Dean-Stark apparatus.

Originally posted by: Pocahontas

Professor , you only said that S has to stop R from evaporating , so i suggested this chemical procedure for SR's esterification and trust me, in this one, R acid cannot escape S alcohol. 🥳

Originally posted by: monar

Yeah poco we need Ishtudents like you who understand stuff and make SR inseparable compound
*PS your chemistry is real good...  me bad in chemistry 😭.. but now my yadasth is coming back ... yeah yeah🥳* inna sara thankoooo 🤗

Originally posted by: Pocahontas

🤣..... This ishtudent of yours was on her way to becoming a doctor but she branched off to literature and then to mass communication. 😆

Lub you, Professor. 🤗