"Stereochemistry of bromine addition to trans cinnamic acid" Essays and Research Papers

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    Vector Addition

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    Directed Line Segment: VECTORS • A line segment with direction is called a directed line segment. • If ‘A’ and ‘B’ are two distinct points in the space‚ then the ordered pair (A‚ B) is called as a directed line segment and is denoted by """""# . ! • In """""# ‚ ‘A’ is called initial point and ‘B’ is called terminal ! point of """""# . ! • The distance from ‘A’ to ‘B’ is called the length or magnitude of """""# . The length or magnitude of """""# ! ! is denoted by ’"""""# ’. Thus

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    Addition and Lottery

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    Positive and negative effects of winning the lottery Winning the lottery is something everyone wants. Rarely do people realize that there are also bad effects to having such a large sum of money. A good amount of people that win the lottery are foolish with their money‚ quit their jobs‚ or just don’t know what to do with it. The others that win make smart decisions in either investing their fortune‚ donating it to a good cause‚ or just helping their family be finically stable. Majority of people

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    Trans Fats

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    Trans Fats There is lots of controversy going on about should the trans fats be banned by the government or not. On one side are people who are for ban of trans fats‚ while their opponents think that they should not be prohibited. What are the trans fats? Are they really bad for our health‚ should they be replaced with another substance and why there are so many people against them? Producers have the power over us‚ as well as opportunity to put trans fats into food in small amounts‚ without

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    LAB REPORT! EXPERIMENT#5‚6! MANPREET KAUR KHAIRA! LAB PARTNER: VIAN RAIES! The purpose of this lab exercise was to perform the bromination of (E)-1‚2-diphenylethene (trans-stilbene) by addition reaction in which bromine was added across the double bond to yield a vicinal dibromide. The next step was to perform a double elimination reaction by product gained to synthesize an alkyne‚ that is‚ 1‚2-diphenylacetylene. The two major techniques used in this lab were TLC analysis and UV-vis spectroscopy

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    Avoid Trans Fats

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    Avoid trans fats for health. Trans fat is an unhealthy substance‚ also known as trans fatty acid‚ made through the chemical process of hydrogenation of oils. Hydrogenation solidifies liquid oils and increases the shelf life and the flavor stability of oils and foods that contain them. Trans fat is found in vegetable shortenings and in some margarines‚ crackers‚ cookies‚ snack foods and other foods. The US FDA in 1999 proposed that the Nutrition Facts labels on vegetable shortenings and some cookies

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    Michael Addition Reaction

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    The Michael addition is a reaction named after Arthur Michael. Discovered in 1887‚ this is a carbon-carbon bond making reaction. The result of the Michael addition is a 1‚4 addition of a nucleophile to an alpha‚ beta-unsaturated carbonyl carbon compound. A 1‚4 addition is also commonly referred to as a conjugated addition. Another result of this reaction is a 1‚2 addition of a nucleophile. Some of the common attacking nucleophiles used in this reaction are enolates. Enolates‚ a negatively charged

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    A Cis to Trans Conversion

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    INTRODUCTION Maleic acid and Fumaric acid are both compounds belonging to the carboxylic acids class. In this experiment‚ we formed the two isomers of 1‚2-ethylenedicarboxylic acid and tested the solubility and melting points of both of these products. Both of these compounds involve a carbon-carbon double bond that is composed of one σ bond and one π bond. The overlap of sp2 hybrid orbitals forms the σ bond‚ and one empty p orbital forms the π bond. This process is illustrated in the figure below:

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    Acid

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    Acid Base Titration bre’ana March 1‚ 2013 Purpose: The purpose of this experiment is to determine the concentration of a solution of NaOH by titration with a standard solution of HCl. It was also the purpose to determine the concentration of a sample of white vinegar by titration with a standard solution of NaOH. Introduction: Using the method of titration is how the experiment gets to the conclusion of the concentration of a solution. When doing this experiment‚ measurement is very important

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    A -cis to -trans Conversion

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    Experiment 1: "A cis to trans conversion" Saturday‚ June 25‚ 2005 4:19 PM Notes on Theory • Alkenes o They are hydrocarbons with a C=C double bond • Double bonds are stronger and more reactive than single bonds o Hydrocarbons with double bonds used to be known as "olefins"‚ because they had an oily appearance • "Oleum" means oil • "Ficare" means make • Isomers o Geometric isomers have the same molecular formula‚ but a different geometric arrangement • They also have different physical properties

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    Alkene Addition Report

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    Lab 1: Alkene Addition: Bromination of (E)-stilbene I. Introduction: 1. The purpose of the experiment was to perform an electrophilic addition reaction by using pyridinium tribromide to brominate (E)-stilbene and to identify whether it formed the meso- or racemic product through melting point analysis. 2. This is the mechanism for the bromination of (E)-stilbene. However‚ this is the mechanism for Br2 and in class we us Pyridinium Tribromide instead due to the difficulties associated

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