ETHERS Classification of Ethers: Symmetrical ethers – two groups attached to O are identical Ex. CH3CH2OCH2CH3 – diethyl ether Unsymmetrical ethers – two groups attached to O are not identical Ex. CH3CH2OCH3 – ethyl methyl ether Physical Properties of Ethers: Ethers have much lower boiling points compared to alcohols of comparable MWs. BPs of ethers increases with increasing MW. BPs of isomeric ethers increase with increasing alkyl chain length. BPs of ethers are about the
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Discussion Principle behind the experimental design Results are tabulated and with table number and title Graph‚ Drawings (Figure # and Title) Conclusion Recommendation Experimental 1.0 A. Reagents - Anhydrous ZnCl2 - 6M H2SO4 - 10% KI - 6M NaOH - 10% K2Cr2O7 - conc. HCl - DNPH reagent (potential carcinogen!) - unknown sample B. Materials - Small test tube - Hot Plate - 250 mL beaker - Pasteur Pipettes 2.0 Procedures Chemical Analysis was done for each test
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11:30-2:20 Abstract: In this experiment‚ phenylmagnesium bromide‚ a Grignard reagent was synthesized from bromobenzene and magnesium strips in a diethyl ether solvent. The Grignard reagent was then converted to triphenylmethanol‚ a tertiary alcohol with HCl. The reaction for phenylmagnesium bromide was: The reaction for Grignard to triphenylmethanol was: In the formation of the Grignard reagent‚ the limited reagent‚ magnesium was determined and 0.00617mol was calculated. In the second part
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Lab 3: Grignard Synthesis Objective: The goal of this lab is to synthesize a Grignard reagent from bromobenzene and magnesium metal in diethyl ether. This same Grignard reagent would then be used to prepare a tertiary alcohol and then purify and characterize the product. Table of Reagents: Name Chemical formula Melting Point Boiling Point Density Safety Hazards Diethyl ether C4H10O -116.3°C 34.6°C 0.7134 g/ml Flammable Bromobenzene C6H5Br -30.6°C 156°C 1.5 g/ml
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Complete the following questions and submit with your report. 1. Propose the starting materials needed to prepare the following compounds by the Grignard reaction (in pen)‚ using phenylmagnesium bromide as the Grignard Reagent. [pic] 2. If the reaction tube is washed with water but not dried thoroughly‚ what side product is formed (draw the reaction in pen and name the product)? 3. If the bromobenzene
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Objective: The purpose of this experiment was to prepare the Grignard reagent methylmagnesium iodide and react it with benzoin to form the 3o alcohol 1‚2-diphenyl-1‚2-propanediol‚ through an addition reaction pathway. Introduction: Grignard reagents are alkyl or aryl-magnesium halides that act as the nucleophile in Grignard reactions‚ where ketones are reacted with the reagent‚ then treated with acid to produce an alcohol. In the case of this experiment‚ methylmagnesium iodide was created
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11-1:50 Title: Grignard Reaction with a Ketone: Triphenylmethanol Part 1 Objective: The goal of this experiment is to learn to make Grignard reagents. The reactions of the Grignard reagents with ketones form tertiary alcohols. These reagents are highly air- and moisture-sensitive materials. We will observe the formation of the Grignard reagents‚ which magnesium metal is transformed into organometallic salts. Experimental Procedure: Our experiment was as followed as in our text “Microscale
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proportional to the urea concentration. Ammonia which is produced by different decomposition processes is also determined by this method. REAGENTS COMPOSITION 5 volume of Reagent 1 contains buffer and was mixed with 1volume of enzyme reagent (R2). Working reagent were prepared fresh prior to use.
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test (Differentiates primary‚ secondary‚ and tertiary alcohols) Reagent: ZnCl2 in conc. HCl Observation: Rate of reaction (tertiary alcohol> secondary alcohol> primary alcohol) Procedure: 2mL Lucas Reagent in test tube+ 3-4 drops of alcohol‚ stopper‚ shake vigorously‚ NOTE time required (less than 10m mins only) to form an emulsion or separate layers. Oxidation (Confirms if alcohol is oxidizable: presence of H in C-OH bond) Reagent: Neutral KMnO4 Observation: purple color ( brown ppt Procedure:
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