possible to match an unknown compound with a known compound because similar compounds will display similar characteristics. In this experiment‚ identification of the unknown ketone is accomplished through thin layer chromatography‚ melting point‚ and 1H-NMR spectroscopy. The unknown ketone is from a homologous series of methyl ketones. CH3CO (CH2) nCH3 The first step in the lab is the preparation of the solvent used in the developing chamber for thin layer chromatography. The solvent used is a 3:1 mixture
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Substitution Reactions of 3-phenyl-1-phenol‚ 2-pentanol‚ and 2‚4-dimethyl-3-pentanol Samantha Sparks‚ Isi Nosegbe and Sabrina Becker. Department of Chemistry‚ IUPUI‚ 402 N. Blackford St.‚ Indianapolis‚ IN 46202 This project was collaborated on by three different organic chemistry students‚ who individually synthesized and researched each of the three substitution reactions in this experiment.. The first reaction was an Sn2 reaction of 3-phenyl-1-propanol with NaBr and H2SO4 to create1-bromo-3-phenylpropane
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compound. The other two peaks correspond to the peaks of aromatic carbon-carbon double bonds. The proton NMR acquired indicates two different hydrogen’s present in the compound which correctly corresponds to triphenylmethanol. The peak at about 7.4ppm is the peak for the aromatic hydrogens on the three phenyl rings. The peak at about 3.6ppm is the hydrogen part of the hydroxyl group. The carbon NMR acquired also corroborates the conclusion that the final compound is triphenylmethanol. The peak at
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Bromination of Acetanilide Objective: The objective of this experiment was to use melting point and NMR to determine which of two isomers‚ ortho or para‚ would most likely form after brominating Acetanilide through electrophilic aromatic substitution. Procedure/Observations: 1. Weigh out ~280 mg of acetanilide in a 10 mL r.b. flask with a stir bar. 2. Then‚ add 2.0 mL of glacial acetic acid using a calibrated Pasteur pipet. 3. Stir the mixture until all of the acetanilide has dissolved
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that was beginning to kill many people all over the world. She had always had a special bond with her grandson and always supported his research. Inspired by her‚ Raymond began to test cancerous liver samples in rats using nuclear magnetic resonance (NMR) equipment. This equipment wasn’t new by any means and was already being used in bio-chemistry and geology to study rocks and minerals. It worked by putting a nuclei in a magnetic field which then emitted and reabsorbed electromagnetic radiation. This
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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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the literature melting point of 146°C. Potential source of errors could be in the filtration process which could decrease the actual yield. In addition‚ there could be moisture present in the solid leading to errors in the weight. Based on the NMR spectral data‚ the frequency of the signals was 15.6Hz‚ which is very close to the theoretical frequency of 12-18Hz. This confirms that the compound is
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acid (Method B) (Fig. 1). The experiment is operationally simple‚ requiring simply manual stirring‚ filtration‚ and recrystallization‚ readily available inexpensive reagents‚ and short reaction time. Thus‚ it is ideally suited to the students. The NMR and IR spectra of the compound 2 may he used to illustrate the geminal and vicinal couplings along with the effect of the dihedral angle on the latter (Fig. 2) and the coupled vibrations of the
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Organic Chemistry II Laboratory (ABCT357/ABCT3757) Lab Manual 2014-2015 Lee Hang Wai‚ Alston (alston.lee@polyu.edu.hk) Dr. Lee Cheng Hao‚ Samuel (chenghao.lee@polyu.edu.hk) Organic Chemistry II Laboratory (ABCT357‚ ABCT3757) (Group one) Contact: Alston Lee (alston.lee@polyu.edu.hk) Tuesday 8:30-11:30 ‚ Laboratory: Y1315 Lab supporting staffs: YK Au / Kan Chan/Arnold Demonstrators: Dr. Samuel Lee‚ Alston Lee‚ Fu Wai Chung‚ Guo Shuai‚ Yuen On Ying‚ Sep 16 Tue Acetylation of α-D-glucopyranose (Expt
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3371‚ 3309 C-H 2900‚ 2855 C-H stretch‚ methyl 1451 Ar C=C 1278 Acetal 1H NMR Chemical shift (δ) Multiplicity and Integration Assignment Compound B 1.6401 S‚ 3H C-CHa3 1.8602 S‚ 3H C-CHb3 5.5459 S‚ 2H C(ph)Hc 7.0352 M‚ 10H Ar-Hd Compound A: Meso-hydrobenzoin Compound B: Meso-1‚2-diphenyl-1‚2- ethanediol Discussion and Conclusion One can ascertain from the H NMR the stereoselectivity taking place in the reaction. Since there is not coupling of the Hc’s
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