they have restricted rotation around the double bond so they tend to form the cis and trans geometric isomers. While both of these isomers have the same molecular formula‚ they usually vary in many physical features. Cis isomers have two identical groups located on the same side of the double bond‚ while trans isomers have the two groups on opposing sides of the molecule. Trans isomers are usually more stable than cis isomers because there is no steric interaction‚ or repulsion‚ between the carboxyl
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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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Form 6 Chemistry Practical Experiment 18: Cis-Trans Isomers of But-2-enedioic acid Introduction Cis-trans isomers are a kind of stereoisomers called geometrical isomers. Due to the inability of rotation about the C=C bond‚ some compounds possess cis and trans isomers. But-2-enedioic acid is an example of having both isomers. Maleic acid Fumaric acid Cis and trans isomers have different physical properties such as boiling point‚ solubility‚ density and stability
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EXPERIMENT A: CIS-TRANS CONVERSION OF BUTENEDIOIC ACID PRE-LAB ASSIGNMENT 1. Maleic acid is the cis version and fumaric acis is the trans version of butenedioic acid. 2. 3. See attached paper. 4. Maleic anhydride is the compound that crystalizes in part A in the experiment. 5. HCl acts as a catalyst to break one of the carbonyl group in the maleic acid which rotates the structure to form a trans structure of the butonal acid which is the fumaric acid. And it does so by donating
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Though cis-platin is highly effective‚ its counterpart trans-platin is counterintuitively not (7). Trans-platin is highly reactive with the environments that lead to reaching the DNA‚ and this reactivity results in the totality of the administered compound becoming deactivated prior to reacting with the DNA (9). Also the DNA lesion caused by cis-platin on the 1‚2 intrastrand crosslinks between adjacent purines is an act that trans-platin cannot do when looking from a stereochemical perspective (9)
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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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Name: Leigh O’Neill Date: 10th February 2015 Lab Partner: Sinead Murphy Title: Resolution of Trans-Cyclohexane-1‚2-diamine Abstract: The experiment of resolution of Trans-Cyclohexane-1‚2-diamine was completed using recrystallization. This produced a percentage yield of 85% from a theoretical yield of 2.638g. Introduction: Enantiomers are identical and equal in their physical properties except for optical rotation which can be viewed by polarimetry. Diastereomers have different densities‚ melting
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I picked the second quote‚ “trans fats should not be banned. Consumers should make their own choices about what they eat. The government should educate the population about the risks of eating foods with Trans fats‚ but then let people make their own decisions.” The way I look at this situation is‚ we do a lot of bad things to our bodies. We eat fast food‚ sugars‚ drink alcohol and plenty more. Everything that we take into our body systems‚ has some type of effect on our bodies‚ whether it be causing
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Ban Trans-Fat Although fats are considered to be a part of our health‚ there are certain types that should be ignored. One of which has drawn controversial issues is trans-fat. Trans-fat is mostly found in many food sources such as vegetable oil‚ crackers‚ cookies and margarine. It increases blood levels of low density lipoprotein that is considered to be bad cholesterol‚ and decreases level of good cholesterol‚ high density lipoprotein. Trans-fat is created when oils are partially hydrogenated
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Page 1 of 15 CEBU CPAR CENTER Mandaue City‚ Cebu AUDITING THEORY AUDITING IN A COMPUTER INFORMATION SYSTEMS (CIS) ENVIRONMENT Related PSAs/PAPSs: PSA 401; PAPS 1001‚ 1002‚ 1003‚ 1008 and 1009 PSA 401 – Auditing in a Computer Information Systems (CIS) Environment 1. Which statement is incorrect when auditing in a CIS environment? a. A CIS environment exists when a computer of any type or size is involved in the processing by the entity of financial information of significance to the audit
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