Mass of starting material:d6 ms Mass of starting material: 6 ns Mass ofproduct.
ID: 908292 • Letter: M
Question
Mass of starting material:d6 ms Mass of starting material: 6 ns Mass ofproduct. , 2 Mass of starting material: b 7013 C Qualitative Test Results Your Sample (eugenol) Control romine test otassium permanganateoal rad to brow n ron(IIl)chloride Thin Layer Chromatography Results Ri- your sample R-standard Compound Eugenol eugenol acetate Other Post-Laboratory Questions: On a separate sheet (preferably typed) complete the post-laboratory questions in your laboratory manual. Results for questions 2 and 4 may be reported above. Show Additional Post-Laboratory Question: In question 2, explain the significance of each test result That is, how do these results indicate that you have isolated eugenol? CHEM 3117 Organic Chemistry Laboratory SMU Chemistry DepartmentExplanation / Answer
1) percent yield of clove oil = mass of product x 100/ mass of starting = o.4743 x100/0.526 = 90.17%
2) a) with bromine , decorisation/ pale color indicates the presence of unsaturtion
b) potassium permanganate which is purple colored is changed into dark brown precipiate, indicates the reduction of permanganate to MnO2, which is a test for unsaturation. these two test confirm the presence of unsaturation(double/tripleBOnd) in eugenol.
c) Ferric chloride test. This is a test for enols and phenols which give violet/green coloration.
Eugenol being phenolic the report should be either violet/ green , but your report shows foggy yellow.
5) The smaller the Rf value the more polar is the compound. Thus the compound with 0.23 rf is more polar compared to Rf =0.30 HOwever you are reporting equgenol which is phenol and thus more polar with higher Rf and eugenol acetate , less polar with lower Rf value.