"Electrophilic aromatic substitution" Essays and Research Papers

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    (g) / theoretical yield (g) x 100 % yield = 3.28g/5.20g x100 = 63.08% Discussion This experiment involved the addition of trans-cinnamic acid to bromine for the production of 2‚3-dibromo-3-phenylpropanoic acid. This process depicted an electrophilic addition of a halogen to an asymmetrically substituted alkene. A result of this process was the presence of a stereospecific bromonium ion formed by the mechanism of the reaction. The mixing of 2.5g of trans-cinnamic acid with 14.6 ml of 10%

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    years all over the world to treat the same symptoms that we use aspirin to treat. The bark from willow trees‚ along with a few other trees‚ produces an anti-inflammatory agent called salicin. Salicin is an aromatic alcohol‚ this is indicated by the OH group of the benzene ring (benzene is aromatic hydrocarbon‚ which is an unsaturated cyclic hydrocarbon). Benzene and the OH groups are substituents as shown in the diagram. By the

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    it’s a gift for a family member or just a decoration around your house‚ Christmas crafts bring delight for everyone involved. One simple and very popular craft is candle making. Here are a few steps that will show you how to make a wonderful and aromatic pinecone candle: In order to complete this craft‚ you will need the following materials: paraffin wax candlewick handful of small pinecones cinnamon/nutmeg cylindrical candle mold cooking pot candle dye (optional) Once you have assembled your materials

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    - it resembles plastic. Polystyrene is an aromatic hydrocarbon‚ it has several complicated double covalent bonds and is a chain of styrene molecules (C6H5CH=CH2) which is much unsaturated. Gasoline is made up of an assortment of simple aliphatic hydrocarbons such as ethane and isobutene and some aromatic hydrocarbons added as enhancers‚ as their break-up generates more energy. When you drop polystyrene into gasoline; the high energy bonds in the aromatic chain break in favor of simpler single covalent

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    Chapter 5: Solutions‚ Colloids‚ and Membranes Chapter Summary Mixtures and Solutions * A mixture maintains its identity regardless of the proportions of its components. * A mixture can be separated into its pure components through physical separation techniques. * The components are distributed uniformly throughout a homogenous mixture. * The components are not distributed uniformly throughout a heterogeneous mixture. * A solution is composed of a solvent and one or more solutes

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    Cucumis melo Linn. was first described by Linne in 1753. It belong to the family Cucurbitaceae which consists of 825 species in 118 genera (Milind and Kulwant‚ 2011). The birth of Cucumis melo L. has been uncertain. However‚ novel review has testified its origin from East and South Africa. Different cultivated varieties and different forms of fruits have emerged universally in tropical and sub-tropical regions. Cucumis melo L. has a wide geographic distribution. Native countries include South Africa

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    each of the following molecules: O C NH2 H N O C OH H C CH2 (a) (b) O (c) Solutions: a. b. c. d. Amide‚ double bond Amine‚ carboxylic acid Double bond‚ ketone‚ ester O OCH3 (d) CH2OH Aromatic ring‚ double bond‚ alcohol (a) Alcohol (d) Amine (b) Aromatic ring (e) both ketone and amine (c) Carboxylic acid (f) two double bonds 3.2 Propose structures for simple molecules that contain the following functional groups: Solutions: (a). H 3C CH3 OH (b). O (c)

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    1: The structure of Eugenol. The IR spectroscopy run on the sample gave results as shown in Table 2. The –OH stretch accounts for the hydroxyl group on the aromatic ring as shown in Figure 1. The C-H peaks are from the mexthoxy group on the aromatic ring. The C=C-H are a result of the hydrogen’s bonded to the carbons of the aromatic ring. The peak from the C=O stretch is not from the compound‚ but may be a result of product contamination. Absorbance | Shape | Intensity | Group-motion |

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    This article was downloaded by: [CIMAP Central Institute of Medicinal & Aromatic Plants] On: 07 March 2013‚ At: 21:43 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House‚ 37-41 Mortimer Street‚ London W1T 3JH‚ UK Natural Product Research: Formerly Natural Product Letters Publication details‚ including instructions for authors and subscription information: http://www.tandfonline.com/loi/gnpl20 Investigation on

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    First Year ‘all common’ Subjects for: • • • • • • • Civil Engineering Civil & Rural Engineering Computer Engineering Electronics & Communication Engineering Electrical & Electronics Engineering BEIT BE Software First Year ‘Partial Common’ subjects for: Table of Contents 1. 2. 3. 4. 5. 6. 7. 8. 9. MEC 119.3 Applied Mechanics I (3-2-0) ............................................................................................ 2 ELE 105.3 Basic Electrical Engineering (3-1-2) ..............

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