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- 16. Predict the multiplicity for each shaded protons in the following compounds a. CH3CH₂CCl2CH3 C. CH3CH(CH3)CH3 b. CH3CH(CH3)OH d. CH3CH₂COOCH2CH33. Determine the multiplicity of the protons indicated with an arrow in the expected ¹H NMR spectrum of the following compounds. a. b. C. H S зайта HJ5 I need to interpret the NMR data by correlating each peak in the spectrum to each set of hydrogens in the structure. I need help labeling each peak in the spectrum with a letter for ease of description. I need to know what the structure is and the name of the structure too!
- The H NMR spectrum of which of the compounds below, all of formula C7H1202, would consist of a singlet, a doublet and a triplet only? Circle the structure and label the protons on that structure as (s), (d), and (t), respectively. exo I II II IVA STK2083_Molecular_Spectroscopy_Group Assignment.pdf - Adobe Acrobat Reader DC File Edit View Sign Window Help Home Tools STK2083_Molecular. x Sign In 1 /1 119% a. Which of the compounds below best matches the following 'H NMR spectrum? Integration values are indicated next to their corresponding signal. 2. Search 'Signature' Convert PDF но Edit PDF A B Comment OH HO Combine Files D E EI Organize Pages 24 16 2 Redact A Compress PDF 16 U Protect 8 D Fill & Sign Create, edit and sign PDF forms & agreements PPM b. Briefly explain your answer 2 (a) based on number of signals, position of signals and the integration of the signals. Start Free TrialQ1. How many unique protons are in the following molecules (how many signatures/peaks would you expect to see in a 1H NMR spectrum)? Q2. The following NMR spectrum is of 1-chlorobutane. Draw the structure, and match the peaks to their respective protons on the structure: Q3. The following NMR spectrum is of ethyl 4-hydroxybenzoate. Draw the structure, and match the peaks to their respective protons on the structure: Q4. Determine the identity of the following unknown, then draw the structure, and match the peaks to their respective protons on the structure (hint – the molecular formula is C8H18O): -4- -2- -12-
- Identify the important peaks in the following MS spectral data and draw the structure of the important peaks in the following MS spectral data.The IR spectra for acetaminophen and phenacetin are shown below. a. Identify which spectrum is for acetaminophen and which is for phenacetin. b. Label the key bond/functional group signals on each spectrum. (e.g. N-H, C=O, O-H, C=C, C(sp3-H, C(sp³)–H) OH fou acetaminophen phenacetin 100.0 90 80 70 60 50 40 30 20 10 0.0 40000 3000 2000 1500 1000 4000 čm-1 LOD 4000 3000 2000 1500 1000 500 3305.35- 6891 1228.63- 117185 107.83-7. Which of the molecules below correspond to which of the 'H NMR spectra? Explain your choice. Note that in both spectra below, the peaks are singlets of 3H or 9H. FUX 18 # 3H A Denting 3 10 9 8 7 6 5 4 OCH 3 4 +2 9H 1 1 B J 3H Cada 3 2 7 6 5 4 10 9 8 7 9H 1
- 5. Use the 1H-NMR data to determine the structure of the compounds listed below. Indicate which hydrogens are responsible for each signal. a. C2H4C|z: singlet at s 3.7 ppm b. C8H10: § 1.2 ppm (triplet, 3H) § 2.6 ppm (quartet, 2H) § 7.1 ppm (broad singlet, 5H)4. Match the following spectrum to the structure it represents а. 4000 2000 1S00 100 3000 OH OCH, CH3 он OCH3 он b. eo00 1500 1000 spo 4000 3000 он NH2 co,H но H3 C2. Which C4H,Br isomers give rise to the two spectra shown below? b. 8 C. 8 7 7 6 5 5 34 4 8 (ppm) 33 32 PPM 4 8 (ppm) 2H t I 2H d 3 ند 3 2H 2H quint sext NH 2 1H m 2 6H d I C 3H 1.0 PPM 0 0