Search results with tag "Electrophilic aromatic substitution"
Benzene and Its Derivatives
pa01000125.schoolwires.net9.5 What Is Electrophilic Aromatic Substitution? 9.6 What Is the Mechanism of Electrophilic Aromatic Substitution? 9.7 How Do Existing Substituents on Benzene Affect Electrophilic Aromatic Substitution? 9.8 What Are Phenols? HOW TO 9.1 How to Determine Whether a Lone Pair of Electrons Is or Is Not Part of an Aromatic Pi System
Reactions of Benzene & Its Derivatives
colapret.cm.utexas.eduElectrophilic Aromatic Substitution • Electrophilic aromatic substitution: a Electrophilic aromatic substitution: reaction in which a hydrogen atom of an aromatic ring is replaced by an electrophile • In this section: – several common types of electrophiles – how each is generated – the mechanism by which each replaces hydrogen + + H ...
Organic Reactions andOrganic Reactions and Their ...
polymer.zju.edu.cnIn a substitution reaction, a functional group in a particular chemical compound is replaced by another group. Reagent Substrate Reactive intermediate Type of organic substitution Nucleophilic Aliphatic Carbocation Aliphatic nucleophilic substitution Electrophilic Aromatic Carbanion Aromatic electrophilic substitution Free radical substitution
Reactions of Aromatic Compounds - Rutgers University
crab.rutgers.eduWhen a reaction proceeds this way, it is electrophilic aromatic substitution. There are a wide variety of electrophiles that can be introduced into a benzene ring in this way, and so electrophilic aromatic substitution is a very important method for the synthesis of substituted aromatic compounds.
16. Electrophilic Aromatic Substitution
community.wvu.eduExperiment 16 – Electrophilic Aromatic Substitution Page 5 of 8 acetanilide under electrophilic nitration conditions to determine experimentally which of the two substrates is more reactive. (Figure 9) Figure 9. Nitration of an Aromatic Ring Ortho/Para Selectivity with an Activating Group
Reactions of Aromatic Compounds Aromatic …
www.utdallas.eduElectrophilic Aromatic Substitution! Aromatic compounds react through a unique substitution type reaction! Initially an electrophile reacts with the aromatic compound to generate an arenium ion!
Organi II Mechanisms - Organic chemistry
www.slooporganicchemistry.comd. Electrophilic aromatic substitution (Alkylation): e. Electrophilic aromatic substitution (Acylation): f. Nucleophilic substitution reaction of aryl halides with EWG (Meisenheimer complex;
Professor J. Stephen Clark
www.chem.gla.ac.ukPyridines – Electrophilic Reactions N αααα ββββ γγγγ N E N E E N E E E E −E Pathways for the Electrophilic Aromatic Substitution of Pyridines • The position of the equilibrium between the pyridine and pyridinium salt depends on the substitution pattern and nature of the substituents, but usually favours the salt
Professor J. Stephen Clark
www.chem.gla.ac.ukPyridines – Electrophilic Reactions N αααα ββββ γγγγ N E N E E N E E E E −E Pathways for the Electrophilic Aromatic Substitution of Pyridines • The position of the equilibrium between the pyridine and pyridinium salt depends on the substitution pattern and nature of the substituents, but usually favours the salt
Reactions of Aromatic Compounds - Rutgers …
crab.rutgers.eduCh17 Reactions of Aromatic Compounds (landscape).docx Page3 Bromination of Benzene Bromination follows the same general mechanism for the electrophilic aromatic substitution (EAS).
B.Sc. - FIRST YEAR
mjpru.ac.inAromatic electrophilic substitution – general pattern of the mechanism, role of σ and π complexes, Mechanism of nitration, halogenation, sulphonation, mercuration and Friedel-Crafts reaction. Energy profile diagrams. Activating and deactivating substituents, orientation and ortho/para ratio, Side chain ...
ELECTROPHILIC AROMATIC SUBSTITUTION …
www.saplinglearning.com16.5 ELECTROPHILIC AROMATIC SUBSTITUTION REACTIONS OF SUBSTITUTED BENZENES 763 nal substituent group is called a meta-directing group. Thus, the nitro group is a meta-directing group because all electrophilic substitution reactions of nitrobenzene occur at the
ELECTROPHILIC AROMATIC SUBSTITUTION REACTIONS OF …
www.saplinglearning.com16.4 ELECTROPHILIC AROMATIC SUBSTITUTION REACTIONS OF BENZENE 755 Step 2 Reaction of the benzene p electrons with the electrophile to form a carbocation inter- mediate. (Notice that either of the oxygens can accept the electron pair.) Step 3 Loss of a proton from the carbocation to give a new aromatic compound. Nitration is the usual way that nitro groups are introduced into aromatic rings.
Electrophilic Aromatic Substitution Reactions - UCLA
www.chem.ucla.eduElectrophilic Aromatic Substitution Reactions, Course Notes Archive, 4 Disclaimer: All images are borrowed from: Bruice, P. Organic Chemistry.Pearsons Prentice Hall, 2004.
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