Chemistry 30A3 Fall 2011 Labs Dr. Troendle 54

Chemistry 30A3 Fall 2011 Labs Dr. Troendle 54 - Alkyl m- or

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Chemical Biology 3OA3, September 2009 Page 54 5. P RE -L AB In week 1, you will have to calculate, beforehand, how much of each reagent to add to the reaction. Most reagents will be present in excess in order to drive the reaction toward completion. Complete Table 1, then calculate the number of moles of alkyl m - or p -hydroxybenzoate you will be using, based on the mass you start with (250 mg). Then calculate the number of moles of the other reagents, as well as the weight and volume, using Table 2, and enter your calculated masses and volumes in Table 3. Table 1. Your target compound.
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Unformatted text preview: Alkyl m- or p-hydroxybenzoate? Molecular weight of starting material: Molecular weight of target diester: R 4-(C=O)Cl: Table 2. Molecular weights and densities of acyl chlorides Reagent Molecular Weight (g/mol) Density (g/mL) Acetyl Chloride 78 1.10 Propionyl Chloride 93 1.06 Benzoyl Chloride 141 1.21 Pivaloyl Chloride (t-BuCOCl) 121 0.98 Decanoyl Chloride 191 0.93 Table 3. Complete this table before the lab. Reagent molar equivalents Moles mol. wt. (g/mol) density (g/mL) weight (g) volume (mL) Alkyl m- or p-Hydroxybenzoate 1 N/A 0.25 N/A Triethylamine 2 0.73 Acyl chloride 2...
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