A hydrocarbon is an organic chemical compound composed exclusively of hydrogen and carbon atoms. Hydrocarbons occur naturally and form the basis of crude oil, natural gas, coal, and other important energy sources. In this unit of class 11 chemistry, we will learn in detail about nomenclature, isomerism, structure, preparation, physical & chemical properties of alkanes, alkenes, alkynes, & aromatic hydrocarbons. We will learn to explain different conformations of ethane (staggered & eclipsed). In aromatic hydrocarbon, we will also learn resonance structures, we will also think about how those reactions are occurring on a molecular level with reaction mechanisms- electrophilic substitution reactions of benzene (nitration, sulphonation, halogenation, Friedel craft's alkylation & acylation.
Curated by: Khan Academy India - English (66 videos)
In this video we start with a quick recap of catalytic hydrogenation of alkenes and alkynes. Then we look at a few ways by which an alkyl halide can be converted to an alkane. First comes the Zn + HCl reduction. Next is the Wurtz coupling run only in dry ether. We also discuss the two popular mechanisms of Wurtz reaction: the free radical one and the carbanion pathway. A closing practice question locks the concepts in. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/class-11-chemistry-india/xfbb6cb8fc2bd00c8:in-in-hydrocarbons?lang=en Timestamps: 00:10 Recap of Catalytic hydrogenation 01:26 Alkyl halide reduction with Zn, HCl 03:38 Wurtz reaction 04:54 Why “dry” ether in wurtz reaction 05:44 Mechanism 1(free radical): Wurtz reaction 07:06 Mechanism 2(carbanion): Wurtz reaction 09:52 odd even chemistry of wurtz 12:52 Practice Question Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Nitika Duggal