Alkanes

1 Wurtz Synthesis This method was first used by Adolph Wurtz in 1854 Methane cannot be produced in this process R-X + 2Na + X-R 2CH3-Br + 2Na R-R + 2NaX CH3-CH3 + 2NaBr Chapter 2 Example 14 7 Preparation of Alkanes Which alkyl halides can be used to prepare pentane by the Wurtz synthesis

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(Hindi) Hydrocarbons

Wurtz Reaction and Kolbe's Electrolysis (in Hindi) 12m 45s Corey House Reaction Preparation of Alkane from Grignard Reagent Pyrolysis Reaction (in Hindi) 12m 23s Physical properties of alkanes 12m 28s Melting point of alkanes 11m 18s Chlorination of alkanes 11m 10s

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PERIYAR UNIVERSITY

3 4 Cycloalkanes-Wurtz reaction Dieckmann ring closure reduction of aromatic hydrocarbons - Baeyer's strain theory and its limitations-Sache-Mohr theory– Ring strain in small rings (cyclopropane and cyclobutane)-theory of strainless rings 3 6 Alkenes: Electrophilic and free redical mechanism of addition in alkenes-

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B Sc Nutrition Food Service Management and Dietetics

2 1 Cycloalkanes - Preparation – Wurtz reaction and Dieckmann's condensation - Properties of Cycloalkanes – Substitution and Ring opening reactions 2 2 Polarisation - Inductive effect Mesomeric effect and Steric effect (Acid and Base Strength)

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Cycloalkanes

Preparation of Cycloalkanes Following methods are commonly used for the preparation of cycloalkanes (a) From dihalogen compounds : α-ω elimination from dihalides having halogen atoms on two ends of carbon chain (α-ω dihalides) with Na or Zn dust gives rise to the formation of cycloalkanes The method can be regarded as intramolecular Wurtz reaction and is called Freund reaction

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Cyclohexane

Preparation Cyclohexane can be prepared via a Wurtz reaction of 1 6-dibromohexane Catalytic hydrogenation of benzene will also yield cyclohexane Projects Organic extractions Handling Safety Cyclohexane is flammable and should be handled with care It is also harmful if inhaled so wear proper protection Storage

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CHAPTER 13 HYDROCARBON Hydrocarbons are composed of

Preparation:- Wurtz reaction:- 2CH CH Br 2Na CH CH CH CH 2NaBr Follow mainly free radical mechanism Useful in preparing an alkane containing even number of carbon atoms Stepping up reaction Frankland reaction From Grignard reagent (RMgX) From unsaturated hydrocarbons:- Sabatier-Senderens reduction 4

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Important notes of Hydrocarbons for CBSE JEE

Staggered Conformation: H atoms on two adjacent carbon atoms are farthest to each other i e dihedral angle is 60 Preparation of Alkanes: Reduction of Alkyl Halides: RX + Zn: + H + → RH + Zn 2+ + X- 4RX + LiAlH 4 → 4RH + LiX + AlX 3 (X≠ F) RX + (n – C 4 H 9)3 SnH → R-H + (n – C 4 H 9) 3 SnX Grignard Reagent: ALSO READ :-Short notes of Quadratic Equation for IIT – JEE main

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Grignard reagent mechanism

The Grignard reagent as an organometallic reagent contains metal i e magnesium is directly attached to the carbon of an organic molecule and hence it can also be called an organomagnesium compound A Grignard reagent has a formula RMgX where X is a halide (bromides and iodides are common with chlorides being seen as well and fluorides are generally unreactive) and R is an alkyl vinyl

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SAURSHTRA UNIVERSITY B Sc SEMESTER

Formation of alkanes: Wurtz reaction Wurtz-Fittig reactions Free radical substitutions: Halogenation-relative reactivity and selectivity Hydrocarbons containing carbon-carbon bonds Formation of alkeneelimination reactions dehydration of alcohols

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Important notes of Hydrocarbons for CBSE JEE

Staggered Conformation: H atoms on two adjacent carbon atoms are farthest to each other i e dihedral angle is 60 Preparation of Alkanes: Reduction of Alkyl Halides: RX + Zn: + H + → RH + Zn 2+ + X- 4RX + LiAlH 4 → 4RH + LiX + AlX 3 (X≠ F) RX + (n – C 4 H 9)3 SnH → R-H + (n – C 4 H 9) 3 SnX Grignard Reagent: ALSO READ :-Short notes of Quadratic Equation for IIT – JEE main

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Subject Code : CCSCH2 INORGANIC ORGANIC AND PHYSICAL

Cycloalkanes 4 2 1 Preparation using Wurtz's reaction Diecknann's ring closure and reductions of aromatic hydrocarbons 4 2 2 Substitution and ring opening reactions 4 2 3 Bayer's strain theory and theory of strainless rings UNIT –V (Physical Chemistry) (18 Hours) 5 1

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BANGALORE UNIVERSITY

Alkanes: Sources Nomenclature of branched chain alkanes preparation of symmetrical and unsymmetrical alkanes- Corey- House reaction and Wurtz reaction - their merits and demerits Conformational analysis of n-butane - Sawhorse and Newman projection formulae to be used - Energy profile diagram Cycloalkanes: Nomenclature

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US10494486B2

The invention relates to a method for carrying out organic reactions with fine-particulate alkali metal dispersions in a continuous operation preferably on a rotary disc reactor This method can be used primarily in the production of coupling products following Wurtz synthesis and in the production of macrocycles using acyloin condensation

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Kumaun University CHEMISTRY SEMESTER

4 Alkanes and Cycloalkanes methods of formation ( with special reference to Wurtz reaction Kolbe reaction Corey-House reaction and decarboxylation of carboxylic acids) physical properties and chemical reactions of alkanes Preparation of original solution for basic radical analysis

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PERIYAR UNIVERSITY

3 4 Cycloalkanes-Wurtz reaction Dieckmann ring closure reduction of aromatic hydrocarbons - Baeyer's strain theory and its limitations-Sache-Mohr theory– Ring strain in small rings (cyclopropane and cyclobutane)-theory of strainless rings 3 6 Alkenes: Electrophilic and free redical mechanism of addition in alkenes-

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The Cyclohexane Molecule

The Cyclohexane Molecule -- Chemical and Physical Properties Cyclohexane is a cycloalkane with the molecular formula C 6 H 12 Cyclohexane is used as a nonpolar solvent for the chemical industry and also as a raw material for the industrial production of adipic acid and caprolactam both of which are intermediates used in the production of nylon

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BSc 1st Year Chemistry Notes PDF (Sem I II): Download

This post includes download links for BSc 1st year chemistry notes pdf We have assembled notes important questions ebooks other study material for BSc 1st year students BSc (or Bachelor of Science) is basically a 3-year undergraduate program designed for individuals who want a career in the field of Science BSc 1st year consists of two semesters i e Semester I and Semester II

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[PDF] Organic Chemistry Basics and Hydrocarbons Notes

Carbon-Carbon sigma bonds (Alkanes and Cycloalkanes): General methods of preparation- Wurtz and Wurtz Fittig reaction Corey House synthesis physical and chemical properties of alkanes Free radical substitutions Halogenation concept of relative reactivity v/s selectivity

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Reaction of α ω

A conceptually simple route to cycloalkanes involves treatment of an a w-diha Ode with an alkyllithi um 5 In a formal sense this mechanistically intriguing process may be viewed as an intramolecular Wurtz-type coupling of an a-lithio-w-haloalkane formed by initial metal-halogen interchange 6 Although such an approach has been exploited by Parham Bradsher and co-workers for the preparation of

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Preparation of Alkanes and Cycloalkanes Chemistry tutorial

Preparation of Alkanes and cycloalkanes tutorial all along with the key concepts of Wurtz reaction Kolbe's electrolytic method Hydrogenation of Unsaturated Hydrocarbons Reduction of Alkyl Halides Decarboxylation of Carboxylic Acids Preparation of Cycloalkanes Nitration Isomerisation

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