Organic Lab question: How do I calculate theoretical yield? Final product is sup

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Organic Lab question: How do I calculate theoretical yield? Final product is supposed to be E,E-1,4-diphenyl-1,3-butadiene. I don’t know where to start. Modified Wittig: Arbusov, Horner-Emmons Mayo: Chapter 6 pp. 294-299 You will be synthesizing E, -14-Diphenyl-1,3-butadiene, using the procedure to follow experiment No water or acetone (why?) the day of the experiment Questions: At the end of the write-up. your glassware is cleaned the lab period before you plan on doing the Place ImL of benzyl chloride, 1.54mL of triethylphosphite and a magnetic spin vane ina heat POEO benzyl chloride tneth phosphate 5mL thick or thinkpreferred) walled conical vial (the reagents will be dispensed at the stockroom window, bring your flask with the spin vane in it and a san) Gloves goggles too. Attach reflux for about I hour, continually raising the temperature of your aluminumb thermometer inserted through the condenser INTO the LIQUID reads 180-200°C. Remember your thermometer only goes to 280 C, so be careful. The temperature must be maintained at least 5 minutes for the reaction to go to completion. You cannot leave the thermometer in the apparatus constantly, so check the temperature every 15 minutes or so, by inserting the thermometer into the liquid. Cool this reaction to room temperature. a jacketed condenser(turn the water on to fill the jacket and then turn it off) and lock until a Step 2 Hormer Emmons OEt OEt Nar o-2 DMF trans-cinnamaldeltyde E.E-1,4 diphenyl-1,3-butadien 20

Explanation / Answer

Theoretical yield of product diphenyl diene

Since mass of any of the substance taken is not given, I will explain to you in theoretical terms

1 mole of trans-cinnamaldehyde to react with 1 mole of phosphonium salt (priduced from benzyl chloride).

calulate moles of cinnamaldehyde present = mass cinnamaldehyde/molar mass of cinnamaldehyde

moles of product formed = moles of cinnamaldehyde present

theoretical yield of product = moles of product x 206.28 g/mol

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