2011 at N402. Abstract EXPERIMENT NUMBER ONE IS ALL ABOUT THE ELECTROPHILIC SUBSTITUTION OF AROMATIC COMPOUNDS. AROMATIC COMPOUNDS ARE THOSE ORGANIC COMPOUNDS WHICH HAVE BENZENE RING (CYCLOHEXA-1‚3‚5-TRIENE). AROMATIC COMPOUNDS ARE ALWAYS FOLLOWS THE SUBSTITUTION REACTION BECAUSE OF THE STABILITY OF THE BENZENE RING. IT WILL NOT PROCESS THE ELIMINATION‚ ADDITION OR REARRANGEMENT REACTION. THIS EXPERIMENT WILL DETERMINE THE FACTORS OF ELECTROPHILIC SUBSTITUTION ON DIFFERENT AROMATIC RINGS
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Introduction : "Aromatic" and "aromatic compound" sidetrack here. For implications identified with odor‚ see fragrance compound. Two distinctive reverberation types of benzene (top) consolidate to create a normal structure (base) In natural science‚ the term aromaticity is utilized to depict a cyclic (ring-molded)‚ planar (level) particle that shows strange dependability when contrasted with other geometric or connective game plans of the same arrangement of iotas. As an aftereffect of their security
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3 Questions I have: ● According to Asimov‚ when do people solve problems or make discoveries‚ and why? ● How does Asimov include the scientific information of Archimedes’ and Kekule’s discoveries necessary to help understand them better? ● What was Asimov’s idea behind “Eureka! Eureka!” and how did it fit into the purpose of the story? In the story The Eureka Phenomenon by Isaac Asimov‚ Asimov includes the scientific information of Archimedes’ and Kekule’s discoveries to help the audience und
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starting benzene ring in order to figure out whether the reaction with be ortho or para directors or meta directors. If the substituents are electron withdrawing groups then it will be left with meta as the product but if the substituents are electron donating groups then the product will be ortho or para. It is much easier for a molecule such as a phenol to undergo nitration if compared to other molecules‚ where the hydroxyl group is an ortho-para director and an activator of the benzene ring. In
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Property (Condition‚ Method) Synonyms Name Ethylbenzene; benzene; ethylbenzol; phenylethane; etilbenzene; ethylbenzeen; aethylbenzo; ethylobenzen Chemical Formula C8H10 Chemical Structure Table 1.1: The table of chemical properties of Ethylbenzene. Table 1.2 The table of the physical properties of Ethylbenzene. Chemical and Physical Properties of Styrene Property (Condition‚ method) Common Synonym Vinyl Benzene; phenylethene; ethenyl Benzene; cinnamene Molecular Formula C8H8 Chemical Structure C6H5CH=CH2
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residue that can stain smokers’ teeth‚ fingers and lungs. Arsenic It can cause cancer as well as damaging the heart and its blood vessels. It can interfere the ability of repairing our dna. Benzene a solvent used to manufacture other chemicals‚ including petrol. It is well-established that benzene can cause cancer‚ particularly leukaemia. Cadmium a metal used mostly to make batteries.the amounts of cadmium present in tobacco smoke are capable of affecting our health and It is a known cause
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of the bromination of acetanilide (assign regiochemistry of bromo product - ortho/meta/para‚ why selective?) The regiochemistry of the product was para. The substituent presented on the benzene ring had nitrogen right next to the carbon of the benzene. The lone pair of nitrogen could delocalize over the benzene ring and activate it. An activating group was ortho or para directing because the carbocation formed by this arrangement gave the most stabilized resonance structures. The majority was the
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CHE656 Computer Applications for Chemical Engineering Practice Process Simulation with ASPEN PLUS Exercise Problems Version 2012 Prepared by Dr. Hong-ming Ku King Mongkut’s University of Technology Thonburi Chemical Engineering Department Chemical Engineering Practice School © May 2004-2012 – Use with Permission of the Author Only 1 Section 1 Elementary Modules‚ Mass Balances‚ and Degree of Freedom Analysis 2 1. Mass Balances and Constraints with Elementary Modules
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Beltran RELATIVE RATES OF ELECTROPHILIC AROMATIC SUBSTITUTION I. Objective(s) In this Experiment‚ the relative reactivities of different substituted benzenes towards bromination will be determined‚ where bromine is dissolved in acetic acid. Materials and apparatus Test solutions: 0.2 M solutions in ethyl acetate: Benzene‚ chlorobenzene‚ phenol‚ nitrophenol‚ aniline and acetanilide. Measuring pipettes (5 mL) micro test tubes 0.05 M Br2 in 90% CH3COOH Pasteur pipettes
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substitutions rather than addition reactions. Substitution of a new group for a hydrogen atom takes place via a resonance-stabilized carbocation. As the benzene ring is quite electron-rich‚ it almost always behaves as a nucleophile in a reaction which means the substitution on benzene occurs by the addition of an electrophile. Substituted benzenes tend to react at predictable positions. Alkyl groups and other electron-donating substituents enhance substitution and direct it toward the ortho and para
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