Question

can you please show the complete calculations for the limiting reagent, the theoretical yield, and the percent yield.

thank you so much

o 1.6-1.8 eq. 1.4-1.5 eq. PPh Ar c o, AH BCOR sat. NaHCO 20°C,0.6-3 h Results Mass Benzaldyhyde Mass Mass (carbethoxymethylene) Final triphenylphosphorane product 0.233 g 0.01 g 0.0578 Coupling constants Doublet 1 6.446- 6.406=0.040*400 =16HZ Coupling constants Doublet 2 5.948- 5.916=0.032*400 =12.8 Hz The final product was a clear film and smelled like cinnamon.

Answer 1

PPhz POH YH + Br М ОН Naнco, benzaldehyde MW = 106 g/mol 0.057 g MW = 148 g/mol Final product 0.01 g Reaction yield is the amount of product actually formed 0.057 g = 000054 moles moles =- 106 g/mol According to the balanced equation, the required ratio is 1: 1 Limiting reagent: benzaldehyde 1 mol of benzaldehyde produces of 1mol of cinnamic acid Theoretical yield: The moles of the acid product that would be obtained should be calculated if all the limiting reagent is consumed in the reaction. 1 mol of cinnamic acid mol of acid cinnamic = 0.00054 moles of benzaldehyde X – 1 mol of benzaldehyde = 0.00054 moles g of acid cinnamic = 148 g/mol x 0.00054 met g of acid cinnamic = 0.08 g So: Theoretical yield: 0.08 g % yield and is defined as follows: Reaction yield % yield = X 100 Theoretical vield 0.01 g % yield =- x 100 0.08 g % yield = 12.5