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Interpretation of a Dry Lab Unknown Results The purpose of this lab was to identify an unknown compound using an infrared spectroscopy graph proton NMR graph with the addition of a carbon 13 NMR graph The formula for the unknown compound was C6H12O2 The degrees of unsaturation was determined to be 1 which means that the compound could have 1 ring or 1 double bond In order to determine the structure of this unknown compound labeled 24 all three graphs should be analyzed Calculations 1 Degrees of Unsaturation 2C H 2 2 C6H12O2 DOS 2 6 12 2 2 1 Figure 1 IR Spectra of Unknown Figure 1 Above shows the functional groups of the unknown compound Figure 2 Proton NMR of Unknown and Unknown Structure Figure 2 Above shows the proton NMR for the unknown compound The parts of the structure labeled correspond with letters in the NMR Table 1 Proton NMR Data for Unknown Label Multiplicity Integration Chemical Shift ppm A B C D singlet triplet quintet sextet 3H 2H 2H 2H 2 1 2 0 4 1 4 0 1 7 1 5 1 5 1 3 triplet E Table 1 Above shows the multiplicity integration and chemical shift of the proton NMR Figure 2 for the unknown compound The letters displayed on the structure above correspond to the letters in the table 1 1 99 3H Figure 3 Carbon 13 NMR for Unknown Figure 3 Above shows the carbon 13 NMR for the unknown compound The parts of the structure labeled correspond with the letters in the NMR Table 2 Carbon 13 NMR Data for Unknown Label A B C D E Chemical Shift ppm 170 64 30 20 18 F Table 2 Above shows the chemical shift of the carbon 13 NMR for the unknown compound The letters displayed on the structure above correspond to the letters in the table 14 Discussion Using IR spectra Proton NMR and carbon 13 NMR the unknown was able to be identified The degree of unsaturation of 1 which meant there had to be 1 ring or 1 double bond The IR spectra confirmed the functional groups found in the compound The NMR spectras helped determine the structure of the compound The analysis showed that the unknown compound 24 was Butyl acetate


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UAB CH 106 - Lab Spectroscopy

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