Common Uses of Alkyl Halides

Common Uses of Alkyl Halides

Alkyl halides as Solvents – Alkyl halides are used primarily as industrial and household solvents. – Carbon tetrachloride (CCl4) was once used for dry cleaning, spot removing, and other domestic cleaning. – Carbon tetrachloride is toxic and carcinogenic (causes cancer), however, so dry cleaners now use 1,1,1-trichloroethane and other solvents …

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Electrophilic Addition to Alkenes

Electrophilic Addition to Alkenes

Electrophilic Addition to Alkenes Reactivity of the Carbon–Carbon Double Bond – All alkenes have a common feature: a carbon–carbon double bond. – The reactions of alkenes arise from the reactivity of the carbon–carbon double bond. – Once again, the concept of the functional group helps to organize and simplify the …

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Synthesis of Alkenes – Six methods

Methods for Synthesis of Alkenes – Six methods for Synthesis of Alkenes will be discussed as follow: (1) Dehydrohalogenation of alkyl halides – Dehydrohalogenation is the elimination of a hydrogen and a halogen from an alkyl halide to form an alkene. – dehydrohalogenation can take place by the E1 and …

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Gaseous state – Online MCQ test

gaseous state - Online MCQ test

Online MCQ test on gaseous state – In this topic we offer you, online MCQ test in the fundmental of gaseous state . – It is a simple test to measure the strength of your knowledge in the basics of understanding the topics of gaseous state. – The test consists …

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Alkene Synthesis by Dehydration of Alcohols

Alkene Synthesis by Dehydration of Alcohols

Alkene Synthesis by Dehydration of Alcohols – Dehydration of alcohols is a common method for making alkenes. The word dehydration literally means “removal of water.” – Dehydration is reversible, and in most cases the equilibrium constant is not large. – In fact, the reverse reaction (hydration) is a method for …

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Alkene Synthesis by Elimination of Alkyl Halides

Alkene Synthesis by Elimination of Alkyl Halides

Alkene Synthesis by Elimination of Alkyl Halides – Dehydrohalogenation is the elimination of a hydrogen and a halogen from an alkyl halide to form an alkene. – dehydrohalogenation can take place by the E1 and E2 mechanisms. – The second-order elimination (E2) is usually better for synthetic purposes because the …

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Physical Properties of Alkenes

Physical Properties of Alkenes

Physical Properties of Alkenes (1) Boiling Points and Densities – Most physical properties of alkenes are similar to those of the corresponding alkanes. – For example, the boiling points of but-1-ene, cis-but-2-ene, trans-but-2-ene, and n-butane are all close to 0 °C. – Also like the alkanes, alkenes have densities around …

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Stability of Alkenes

Alkenes

Stability of Alkenes – In making alkenes, we often find that the major product is the most stable alkene. – Many reactions also provide opportunities for double bonds to rearrange to more stable isomers. – Therefore, we need to know how the stability of an alkene depends on its structure. …

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Commercial Importance of Alkenes

Commercial Importance of Alkenes

Commercial Importance of Alkenes – Because the carbon–carbon double bond is readily converted to other functional groups, alkenes are important intermediates in the synthesis of polymers, drugs, pesticides, and other valuable chemicals. – Ethylene is the organic compound produced in the largest volume, at around 160 billion pounds per year …

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Nomenclature of Alkenes

Nomenclature of Alkenes

Nomenclature of Alkenes – Simple alkenes are named much like alkanes, using the root name of the longest chain containing the double bond. The ending is changed from -ane to -ene. – For example, (ethane) becomes “ethene,” (propane) becomes “propene,” and “cyclohexane” becomes “cyclohexene”. – When the chain contains more …

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Elements of Unsaturation

Elements of Unsaturation in Hydrocarbons

Elements of Unsaturation (1) Elements of Unsaturation in Hydrocarbons – Alkenes are said to be unsaturated because they are capable of adding hydrogen in the presence of a catalyst. – The product, an alkane, is called saturated because it cannot react with any more hydrogen. – The presence of a …

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Acids and Bases – Online MCQ test

Acids and Bases - Online MCQ test

Online MCQ test on Acids and Bases – In this topic we offer you, online MCQ test in the fundmental of Acids and Bases . – It is a simple test to measure the strength of your knowledge in the basics of understanding the topics of Acids and Bases – …

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Reactions of Alkyl Halides

In this subject we will discuss the Reactions of Alkyl Halides with chemical equations and examples Introduction to Alkyl Halides – Our study of organic chemistry is organized into families of compounds classified by their functional groups. – We use alkyl halides to introduce substitution and elimination, two of the …

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Predicting SN1 SN2 E1 E2 reactions

Predicting the mechanisms: SN1, SN2, E1, E2 reactions – In this subject we will learn how to predict the the mechanisms of SN1, SN2, E1, E2 reactions – Given a set of reagents and solvents, how can we predict what products will result and which mechanisms will be involved? – …

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Comparison of E1 and E2 reactions

Comparison of E1 and E2 reactions

Comparison of E1 and E2 Elimination Mechanisms – Let’s summarize the major points to remember about the E1 and E2 reactions, focusing on the factors that help us predict which of these mechanisms will operate under a given set of experimental conditions. Then we will organize these factors into a …

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