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ater could destroy the reagent before it has a chance to react with the est Grignard reagents also react with aldehydes, ketones or epoxi cohols; these syntheses are covered in class. Pre-laboratory Preparation Please include a diagram of the apparatus (see p. 23), the equations for the reactions to be carried out (see above), and the following table of "Properties of Substances Involved in Exp ubstance Mol. Wt. Density In g/mL mL Volume in Weight in Number of moles lagnesium Fomobenzene ethyl benzoate riphenylmethanol (expected) (expected) ---- rocedure Clean and dry a 250-mL 3-necked flask, a condenser and a droppin cetone for cleaning and drying and a gentle stream of air to evaporate the ne. Clamp the flask directly over a magnetic stirrer. Place a stirring bar

ater could destroy the reagent before it has a chance to react with the est Grignard reagents also react with aldehydes, ketones or epoxi cohols; these syntheses are covered in class. Pre-laboratory Preparation Please include a diagram of the apparatus (see p. 23), the equations for the reactions to be carried out (see above), and the following table of "Properties of Substances Involved in Exp ubstance Mol. Wt. Density In g/mL mL Volume in Weight in Number of moles lagnesium Fomobenzene ethyl benzoate riphenylmethanol (expected) (expected) ---- rocedure Clean and dry a 250-mL 3-necked flask, a condenser and a droppin cetone for cleaning and drying and a gentle stream of air to evaporate the ne. Clamp the flask directly over a magnetic stirrer. Place a stirring bar

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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maintained. It is difficult to start the reaction between magnesium and an organic halide in the presence of water. In addition, RM9X react with water to give RH + HOM9X, so water could destroy the reagent before it has a chance to react with the ester. Grignard reagents also react with aldehydes, ketones or epoxides to yield alcohols; these syntheses are covered in class. Pre-laboratory Preparation Please include a diagram of the apparatus (see p. 23), the equations for the reactions to be carried out (see above), and the following table of "Properties of Substances Involved in Experiment". Mol. Number of moles Substance Volume in Density In g/mL mL Melting pt in °C Weight in Wt. Magnesium Bromobenzene Methyl benzoate Triphenylmethanol (expected) (expected) Procedure Clean and dry a 250-mL 3-necked flask, a condenser and a dropping funnel. Use acetone for cleaning and drying and a gentle stream of air to evaporate the ace- tone. Clamp the flask directly over a magnetic stirrer. Place a stirring bar and 1.3 g of magnesium into the flask. Insert the condenser into the center neck (remember to grease joints lightly), the dropping funnel into one of the other necks and a stopper into the third. Stopper the funnel. Place an adapter into the top of the condenser and a drying tube into the adapter. Use a hot air blower to dry the entire apparatus. Place 5.3 mL of bromobenzene and 40 mL of anhydrous ether into the funnel. alocc rod to assure gond mixing Stonner the funnel and allow about 5 mL of Otir wit+h
Transcribed Image Text:maintained. It is difficult to start the reaction between magnesium and an organic halide in the presence of water. In addition, RM9X react with water to give RH + HOM9X, so water could destroy the reagent before it has a chance to react with the ester. Grignard reagents also react with aldehydes, ketones or epoxides to yield alcohols; these syntheses are covered in class. Pre-laboratory Preparation Please include a diagram of the apparatus (see p. 23), the equations for the reactions to be carried out (see above), and the following table of "Properties of Substances Involved in Experiment". Mol. Number of moles Substance Volume in Density In g/mL mL Melting pt in °C Weight in Wt. Magnesium Bromobenzene Methyl benzoate Triphenylmethanol (expected) (expected) Procedure Clean and dry a 250-mL 3-necked flask, a condenser and a dropping funnel. Use acetone for cleaning and drying and a gentle stream of air to evaporate the ace- tone. Clamp the flask directly over a magnetic stirrer. Place a stirring bar and 1.3 g of magnesium into the flask. Insert the condenser into the center neck (remember to grease joints lightly), the dropping funnel into one of the other necks and a stopper into the third. Stopper the funnel. Place an adapter into the top of the condenser and a drying tube into the adapter. Use a hot air blower to dry the entire apparatus. Place 5.3 mL of bromobenzene and 40 mL of anhydrous ether into the funnel. alocc rod to assure gond mixing Stonner the funnel and allow about 5 mL of Otir wit+h
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