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Chapter 7

Structure et réactivité de l’alcène

Chapter 7

Alkene Structure and Reactivity

Structure and Bonding of Alkenes
Olefins, which are unsaturated hydrocarbons containing one or more carbon–carbon double bonds, are broadly divided into alkenes and cycloalkenes. …
Nomenclature of Alkenes
The IUPAC naming system for alkenes replaces -an- with -en- in the corresponding parent alkanes. Accordingly, a simple alkene replaces the -ane suffix of …
Degree of Unsaturation
The degree of unsaturation (U), or index of hydrogen deficiency (IHD), is defined as the difference in the number of pairs of hydrogen atoms between the …
Isomerism in Alkenes
Alkenes like 1-butene and 2-butene exhibit constitutional isomerism, as they differ in the position of the double bond. Further, 2-butene exhibits …
Relative Stabilities of Alkenes
The relative stability of alkenes can be determined by comparing their heats of hydrogenation. The lower heat of hydrogenation indicates the more stable …
Introduction to Electrophilic Addition Reactions of Alkenes
The double bond in a simple, unconjugated alkene is a region of high electron density that can act as a weak base or a nucleophile. The filled π …
Regioselectivity of Electrophilic Additions to Alkenes: Markovnikov’s Rule
If a set of reactants can yield multiple constitutional isomers, but one of the isomers is obtained as the major product, the reaction is said to be …
Free Radicals in Chemical Biology: from Chemical Behavior to Biomarker Development
The involvement of free radicals in life sciences has constantly increased with time and has been connected to several physiological and pathological …
Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1′,1”-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions
Dichloro-bis(aminophosphine) complexes of palladium with the general formula of [(P{(NC5H10)3-n(C6H11)n})2Pd(Cl)2] (where n = 0-2), belong to a new family …
Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Direct cross-coupling between two alkenes via vinylic C-H bond activation represents an efficient strategy for the synthesis of butadienes with high …