I\'m writing a lab report catalytic hydrogrenation of eugenol. The solvent used
ID: 903432 • Letter: I
Question
I'm writing a lab report catalytic hydrogrenation of eugenol. The solvent used is ethyl acetate. The product is then filtered and concentrated. H NMR is performed in Cdcl3. On my NMR I noticed the peaks from Ethyl acetate and chloroform from CDcl3. I know how to use integration area of one of the dihydrogenol(product) protons and the impurity(ethyl acetate) protons and calculate mole ratio of dihyrogenol to ethyl acetate to know % purity. Then that mole ratio can be converted to gram ratio.What I'm not sure about is, Do we use the CDcl3 integration too to calculate % purity?
DATA:
Integration of Cdcl3=0.9 cm
Integration area of Dihydrogenol -CH3 protons = 9.0 cm
integration of Ethyl acetate- CH3 protons= 0.7 cm
Molecular Weight of Eugenol 164g/mol
Molecular weight of Dihdroeugenol 166g/mol
Molecular weight of Ethyl acetate= 88.11g/mol
Stating material(eugeno) mass= 0.445 g
Product mass= 0.351 g
I know how to do % yield BEFORE purity calculation is done. What is the corrected % yield AFTER purity calculation is done?
OH OH OCH3 OCH3 Hz, 10%Pd on C ethyl acetate eugenol dihydroeugenolExplanation / Answer
No, we do not use the CDCl3 integration too to calculate % purity. Because this is from the NMR solvent and not from uour reaction.
corrected % yield AFTER purity calculation = (% yield BEFORE purity calculation) x (% purity)