Title: Competing Nucleophiles (Exp 24‚ pp 211-221‚ pp 808-823‚ pp 836-842) Purpose: The purpose of this experiment is to determine the nucleophilic strength of chloride and bromide ions as it reacts with 1-butanol (n-butyl) and 2-methyl-2-propanol (t-butyl alcohol) under SN1 and SN2 conditions. Method: 40 g of ice and approximately 30 ml of sulfuric acid is cautiously added to a 100 mL beaker respectively. Weigh 7.6 g of ammonium chloride and 14.0 g of ammonium bromide and place it in
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electronegative‚ therefore it has a higher partial negative charge. This indicates that the reaction with the oxygen nucleophile should occur at a faster rate. The final product is determined by using proton nuclear magnetic resonance (H NMR). Oxygen appears farther downfield on an NMR because of its ability to deshield protons (4.7 ppm). Nitrogen will appear around 3.9 ppm and methlylene protons which
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Oxide with‚ cis-stilbene‚ trans-stilbene‚ or styrene in an Erlenmyer flask. With this Reaction solution thin layer chromatography will be performed using each reaction solution. The different reactions will then be compared by running co-spot TLC’s. An NMR of the crude products from each reaction will be taken. 3. References: * Chemistry 173Q Organic Chemistry Lab: Laboratory Manual Notes * Mohrig‚ Jerry R.‚ Christina Noring Hammond‚ and Paul F. Schatz. Techniques in Organic Chemistry. 3rd
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March 1‚ 2014‚ from www.JCE.DivCHED.org Appendix Appendix 1. Annotated FTIR Spectrum of Trans-Anethole Oxide (Oxone). Appendix 2. Annotated FTIR Spectrum of Trans-Anethole Oxide (mCPBA). Appendix 3. Annotated 1H NMR Spectrum of Trans-Anethole Oxide (Oxone). Appendix 4. Annotated 1H NMR Spectrum of Trans-Anethole Oxide (mCPBA).
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in the experiment and to distinguish between the two molecules‚ the characteristic long range coupling affects seen in the H1-NMR spectra of bridged six member ring molecules are used. A method for the separation of the two molecules is also explained. This technique can be used as a tool to instruct organic chemistry students in the Diels-Alder reaction and how to use NMR techniques to prove the stereochemistry of the products involved in such reactions. Introduction The Diels-Alder reaction has
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Published on Web 05/25/2006 A Solid-State 95Mo NMR and Computational Investigation of Dodecahedral and Square Antiprismatic Octacyanomolybdate(IV) Anions: Is the Point-Charge Approximation an Accurate Probe of Local Symmetry? Michelle A. M. Forgeron and Roderick E. Wasylishen* Contribution from the Department of Chemistry‚ Gunning/Lemieux Chemistry Centre‚ UniVersity of Alberta‚ Edmonton‚ Alberta‚ Canada T6G 2G2 Received January 6‚ 2006; Revised Manuscript Received April 6‚ 2006; E-mail:
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References: Aldrich Chemical Co‚ Inc. The Aldrich Library of 13C and 1H FT NMR Spectra. 1st ed‚ 1993. Boonyaprapasara N‚ Chokchaicharoenporn O‚ eds. Samunprai Maipuenbaan. Vol. 2. Bangkok: Faculty of Pharmacy‚ Mahidol University‚ 1998: 454 (in Thai). Gritsanapan W‚ Somanabandhu A‚ Titirungruang C‚ Lertchaiporn M. A study on the
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Organic Chemistry II Laboratory (ABCT357) Although studying fundamental theories of chemistry in the class is important to understand the concept of chemistry‚ carrying out experiments to corroborate the theories is also important. It is very important for students to get used to experiments in order to speed up their experiments. Expt.1. Acetylation of α-D-glucopyranose Add slowly 2.5 g (0.014 mol) of powdered D-glucose in small portions (roughly in 7-10 portions and 5 min for each addition)
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Discussion & Error Analysis: By examining the unknown alcohol’s H NMR spectra‚ it can be deduced that the alcohol is 1-(3-methoxyphenyl)ethanol. There are three peaks that have a shift of ~7.0-7.5‚ one with integration values of 1‚ 2‚ and 1.This shows that the alcohol is a meta-substituted benzene ring. The singlet peak with a chemical shift of~ 4.7 ppm with an integration of 1 is from the hydrogen on the OH group. The peak at ~ 1.7 ppm corresponds to the hydrogen of the carbon that is attached
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with Thin Layer Chromatography and one using NMR spectrometry. We will do this by making 2‚ 4 a DNPH derivative and checking the melting points. Theory: By Using specific methods of compounds detection‚ we can match an unknown compound with a known compound because similar compounds will display similar characteristics. In this experiment‚ identifications of the unknown ketone was accomplished using thin layer chromatography‚ melting point‚ and NMR spectrometry. Thin layer chromatography is
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