5. Acylation of Ferrocene Post-Lab Report
Name C.W. Lab Section 1 GTA N.C. Station 30
5. Acylation of Ferrocene
Post-lab report
Fill out the appropriate sections below. Show all work. Your calculated answers need to match the answers in the table and be consistent with significant figures.
Results
Amounts and units
Initial weight of Ferrocene 0.225 g
Moles of Ferrocene 1.21 * 10 ^ -3 mol
Initial volume of acetic anhydride 1.00 mL
Moles of acetic anhydride 0.0110 mol
Initial volume of phosphoric acid 0.300 mL
Initial moles of phosphoric acid 5.15*10^-3 mol
Limiting reagent Ferrocene
Moles of limiting reagent 1.21*10^-3 mol
Final weight of product 0.288g
Theoretical yield 29.49
Moles of product 3.73*10^-4 mol
% yield 97% melting point (°C) of product 128°C -131°C
Calculations:
Moles of Ferrocene 0.225g * mol of ferrocene/186.0g = 1.21 *10^-3
Moles of acetic anhydride 1.0mL *1.08g/mL = 1.08g * mol acetic anhydride/102.09g = 0.011moles
Initial moles of phosphoric acid 0.3mL * 1.685 g/mL = 0.506g * mol/98.09g = 5.15*10^-3
Final weight of product vial A = 40.664-40.867=0.203g; vial B = 38.784-38.869 = 0.085g 0.203+0.085g = 0.288g
Theoretical yield = 0.288* 102.09g = 29.49
Moles of product 0.085g* moles/228.01g = 3.73*10^-4 moles
% Yield: g of actual yield/mass of theoretically yield 100% = 0.288g/29.49*100 % = 97%
Complete the following questions and submit with your report.
1. Is an acyl (acetyl) group an EWG or EDG? EWG
2. While running column chromatography, three compounds were eluted (one was yellow, one was orange, and one was red). Name the three compounds, give the Rfs for each compound on the TLC, draw their structures, and explain how you know the elution order. If you did not elute a red compound, you must still explain what it would have been and draw it’s structure, but you won’t have an Rf for it.
Rf= da/ds 0<
5. Acylation of Ferrocene
Post-lab report
Fill out the appropriate sections below. Show all work. Your calculated answers need to match the answers in the table and be consistent with significant figures.
Results
Amounts and units
Initial weight of Ferrocene 0.225 g
Moles of Ferrocene 1.21 * 10 ^ -3 mol
Initial volume of acetic anhydride 1.00 mL
Moles of acetic anhydride 0.0110 mol
Initial volume of phosphoric acid 0.300 mL
Initial moles of phosphoric acid 5.15*10^-3 mol
Limiting reagent Ferrocene
Moles of limiting reagent 1.21*10^-3 mol
Final weight of product 0.288g
Theoretical yield 29.49
Moles of product 3.73*10^-4 mol
% yield 97% melting point (°C) of product 128°C -131°C
Calculations:
Moles of Ferrocene 0.225g * mol of ferrocene/186.0g = 1.21 *10^-3
Moles of acetic anhydride 1.0mL *1.08g/mL = 1.08g * mol acetic anhydride/102.09g = 0.011moles
Initial moles of phosphoric acid 0.3mL * 1.685 g/mL = 0.506g * mol/98.09g = 5.15*10^-3
Final weight of product vial A = 40.664-40.867=0.203g; vial B = 38.784-38.869 = 0.085g 0.203+0.085g = 0.288g
Theoretical yield = 0.288* 102.09g = 29.49
Moles of product 0.085g* moles/228.01g = 3.73*10^-4 moles
% Yield: g of actual yield/mass of theoretically yield 100% = 0.288g/29.49*100 % = 97%
Complete the following questions and submit with your report.
1. Is an acyl (acetyl) group an EWG or EDG? EWG
2. While running column chromatography, three compounds were eluted (one was yellow, one was orange, and one was red). Name the three compounds, give the Rfs for each compound on the TLC, draw their structures, and explain how you know the elution order. If you did not elute a red compound, you must still explain what it would have been and draw it’s structure, but you won’t have an Rf for it.
Rf= da/ds 0<