Help! Tutul) Below are four structures, all with the im a. Assign a structure to
ID: 574000 • Letter: H
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Tutul) Below are four structures, all with the im a. Assign a structure to each of the IR spectra, putting your answ each). are four structures, all with the molecular formula C5H10, and three IR spectra. Spectra, putting your answer in the box next to each IR (2 points b. Annotate ALL key diagnostic signals on each spec points each spectrum). ignals on each spectrum that helped you arrive at your answers (2 27 ca0. 1644463 61 Transmittance 8C 290 Pr - 2975.54 264.36 500 1500 1000 500 1500 1000 3500 3000 2500 2000 Wavonumturs (cm-1) ya SSE 10clg! Transmittance 3075.01 o 3 6 8 8 165105 2881,11 145422 GER Kit we962 1000 2000 1500 3000 3500 4000 2500 Wavernumbers (cm-1) 1676.95 2729.84 1336.18 1212.58 1050.78 984.83 950.13 Transmittance 1106.71 8. º. 8 8 8 3 800,65 2970.37 3027 21s 2851.83 1374.28 1451,81 9V 9767 1000 500 1500 2500 2000 3000 3500 Wavenumbers (cm-1)Explanation / Answer
From the spectra, there is no Cyclopentane. Only alkenes are present.
1. Spectrum 1 is for first alkene (2-methylbutene) since it is disubstituted alkene it has too weak peak for C=C and a peak at 911 is for CH bend for terminal alkene and 3068 for =CH stretch.
2. It is monosubstituted terminal alkene and has moderate peak for C=C at 1651 & 885 for CH bend and 3075 for =CH stretch
Spectrum 2 is for third alkene(3-methyl-1-butene)
3. It is Z-alkene(trisubstituted) has weak peak for=CH at 3027 & C=C at 1676 and CH bend at 900.
Spectrum 3 "is for second alkene (Z-2-methylbutene)
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