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reciation homework ochem liu - professor k
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Recitation 10 _worksheet (Chapter 10 ) Q1 : Which isomer of C 4 H 9 Br is consistent with the following 1 H NMR spectrum? Q2 : Which isomer of C 4 H 8 O 2 is consistent with the following 1 H NMR spectrum? Q3 : Assign the 1 H NMR signals to specific hydrogens in the molecule. a)
b) Q4 : Deduce a structure consistent with the NMR spectrum or the NMR spectral data. a) C 2 H 4 O b) C 4 H 10 O c) C 4 H 10 O δ = 1. 2 (t, 6 H) δ = 3. 4 (q, 4 H) d) C 4 H 9 Br δ = 1. 04 (d, 6 H) δ = 1. 95 (m, 1 H) δ = 3. 33 (d, 2 H)
(c) Q6 : Which molecule is expected to have 13 C NMR peaks at 13.2, 20.0, 34.6 and 44.6 ppm? Choose between 1-chlorobutane, 1 - chloropentane, 3-chloropentane. Q7 : How many distinct H signals would be present in the 1 H NMR spectra of the following molecules? How many distinct C signals would be present in the 13 C NMR spectra of the following molecules? O O
