✍️ Top 10 Name Reactions for IIT JEE || IITian explains скачать в хорошем качестве

✍️ Top 10 Name Reactions for IIT JEE || IITian explains

In this video, we are going to discuss the top 10 name reactions for IIT JEE mains and advance. For example Cannizzaro's Reactions or Aldol Condensation Reactions. The Cannizzaro reaction involves the treatment of an aldehyde (without alpha-hydrogens) with concentrated NaOH or KOH. Aldehydes when heated with NaOH, undergo a disproportion reaction. One half of aldehyde molecules are oxidized to a carboxylic acid and one half to an alcohol. The Cannizzaro reaction, named after its discoverer Stanislao Cannizzaro. When two different aldehydes, each lacking alpha-hydrogen are heated in an alkaline solution, the reaction is said to be crossed Cannizzaro reaction. For example, when benzaldehyde and formaldehyde is heated in the presence of NaOH, a mixture of benzyl alcohol and sodium formate is formed. Under ideal conditions, the reaction produces only 50% of the alcohol and the carboxylic acid (it takes two aldehydes to produce one acid and one alcohol). To avoid the low yields, it is more common to conduct the crossed Cannizzaro reaction, in which a sacrificial aldehyde is used in combination with a more valuable chemical. In this variation, the reductant is formaldehyde, which is oxidized to sodium formate and the other aldehyde chemical is reduced to the alcohol. In this scenario, each of the two separate aldehydes can be converted completely to its corresponding product rather than losing 50% of a single reactant to each of two different products. Aldehydes containing alpha-hydrogens undergo self-addition in the presence of a base to form products called aldols. The reaction is called aldol condensation. The term aldol is derived from the combination of the words Aldehyde and Alcohol, the two functional groups present in the product. When two acetaldehyde molecules combine with each other in the presence of dilute NaOH, it form aldol (3-hydroxybutanal). The reaction of two different carbonyl compounds (one of which must contain α-H) in the presence of a base is known as mixed aldol condensation. For example, acetaldehyde react with benzaldehyde (which has no α-H) in the presence of a base to form cinnamaldehyde. Key points in aldol condensation 1. The product is a larger molecule that contains newly formed C-C bond. 2. The products contains two functional groups; one carbonyl group and one hydroxyl group. 3. The hydroxyl group is always attached to the beta carbon, which is two carbons away from the carbonyl group. 4. An aldol condensation is a condensation reaction in organic chemistry in which an enol or an enolate ion reacts with a carbonyl compound to form a β-hydroxyaldehyde or β-hydroxyketone, followed by dehydration to give a conjugated enone. For detailed concepts follow me at Unacademy : https://unacademy.com/@kcf521 Early LLakshya Batch : https://unacademy.com/batch/early-lak... IITian Explains Website: https://www.iitianexplains.com/ Download our free book at: https://www.iitianexplains.com/books-... MKA Sir #Name_ReaactionsIITianExplains