3. Two of the four structures below correspond to the 13C NMR spectra shown on this page. Indicate which structure matches each spectrum by drawing the structures in the boxes along the right side of the page. Label the chemically equivalent carbons with the corresponding letter codes provided on the spectra. When "umbrellas" appear, multiple answers are reasonable, but equivalent Cs still need to be labeled with the same letters on your structures and inequivalent Cs need to be labeled with different letters. NH₂ 200 140 150 Carbon Label A B and C B, C and D N H 100 PPM 120 100 4. Label the carbons on the structures below, using letters to designate the chemically equivalent ones. Then, fill in the tables with the requested information; you may have more rows than you need. One row has been completed for you. HO 80 PPM E Chemical Shift 100-150 ppm D and E 50 F G 20 A Carbon Label A CI Chemical Shift 0-50 ppm

Indicate how you can distinguish the following molecules using all four techniques (mass spectrometry, IR spectrometry, 1H NMR, and 13C NMR). Note if a given technique will provide no means to distinguish the compounds.

1. Consider this compound: rCEN CHz CH3 b) How many signals would this compound give in the 'NMR? You may group aromatic hydrogens together as one signal. On the structure above, label the different types of H's as c) А, В, С, etc. hydrogens, their shifts, and the splitting you would observe in the 'NMR spectrum of this compound, for example: In table form, list the peaks, the number of splitting singlet Label # of hydrogens Shift (6) 2.0 etc. AB

refer to image please please label graph and show all work. CALCULATE R VALUE AND EXPLAIN.   will only rate if graph is labelled.   label name of structure too.

Based on the spectra provided, draw the structure. Label each unique carbon and hydrogen with the letters A, B, C… for use in assigning NMR peaks. fill in the data table assigning peaks in each spectrum. You should assign: • All 1H NMR peaks • Significant IR peaks above 1600 cm Example of what the table should include (imagine the structure of ethanol is drawn with the CH3 hydrogens labeled as A, the CH2 hydrogens labeled as B, and the OH hydrogen labeled as C) :  hydrogen proton chemical shift  integration splitting pattern couples to.. A 1.2 3 triplet B B 3.7 2 quartet A C 2.6 1 singlet -

7. Determine the structure of the compounds below from their spectroscopy data. Sketch the 'H-NMR spectra of the following a and b compounds. Assign peaks to the structures. a) C3H10 1.2 8 (3H, triplet) 2.6 8 (2H, quartet) 7.1 8 (5H, broad singlet) b) C4H7BrO 2.11 8 (3H, singlet) 3.52 8 (2H, triplet) 4.40 8 (2H, triplet) Cs Scanned with CamScanner

Identify the following spectra. Full credit is only given if all pertinent peaks are assigned on the spectrum (~5-6 peaks). Label the peaks on the spectrum and place the structure of the compound in the box on the lower left-hand corner of the spectrum (from the table below, no numbering scheme).It is highly advisable to use the tables provided in the infrared handout and lectureto avoid confusion caused by tables from different sources. You do not have to indicate the exact wavenumber of the peak.

Determine the following for the compound C6H15N a.) degrees of unsaturation  b.) Assign the principal IR absorption bands above 1500 c.) draw the structure of the compound  d.) label the protons on your structure with letters and assign them to peaks on the NMR spectrum.

10)Pyrrolium (1) and pyridinium (2) have markedly H different pK, values. Circle the compound with the lower pK₂ value. -N-H 11) The 1H NMR spectrum of phenol is shown below. Of note, the aryl proton signals resolve in this molecule. Assign protons to specific signals in the spectrum 8 7 6 H₂ H₁ 5 ppm H3 H₂ *CHCl3 2 H₁

need soon both