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What is the base peak? (Give your answer as a whole number, no decimal places). 93 What is the parent peak? (Give your answer as a whole number, no decimal places). 94 What is the likely structure of the radical lost to give the fragment ion at 92 m/z? What is the likely structure of the radical lost to give the fragment ions at 78 and 63 m/z? m/z m/z
LOD TRANSMITTANCE1% 8 4000 3000 2894 3415 84 3405 84 2868 81 3394 84 1934 85 3070 60 1667 84 3029 53 1606 4 2992 ¤ 1553 64 2924 72 1611 77 2000 995 42 1497 60 1042 77 1445 58 1413 42 1300 74 1224 64 1211 74 1070 ੪ ॥ 981 64 972 ੪। 802 16 728 5. E 70 67 HAVENUMBERI- 485 18 . . . 1000 500
IR Analysis Using the Characteristic infrared frequencies of organic functional groups tables, complete the table below to characterise the IR spectrum for unknown 19. Unknown 19 IR spectrum Wavenumber (cm*¹) 3070 and 3029 2992 1606 1413 1224 Intensity 수 AP O Assigned Vibration O + + O Assigned Functional Group + ( ( O
12 8.459 8.444 8.6 8.4 8.2 11 1.92 10 8.0 9 8.459 8.444 7.8 7.6 7.4 1.92 7.280 7.095 7.080 8 7 1.94 -7.280 7.095 7.080 7.2 7.0 1.94 6 ppm 5 4 3 -2.336 3.00 2 1 0 ppm
¹H NMR Analysis Using the ¹H NMR spectrum provided in the link below for unknown 19, complete the following signal assignment table: Unknown 19 H NMR spectrum (You may have to right click the spectrum and rotate clockwise) Note: The spectrum was recorded on the 400 MHZ NMR Spectrometer in CDC13. Note Ar-H = Aromatic hydrogen Chemical shift (ppm) 2.34 7.09 8.45 Multiplicity (s, d, t, etc.) Integration (no. of hydrogens) Coupling constants (Hz) N/A Assignment O O
200 149.60 180 160 146.93 140 124.63 120 100 ppm 80 60 40 20.89 20 0
13C NMR Analysis Using the ¹³C NMR spectrum provided in the link below for unknown 19, complete the following signal assignment table: Note: The spectrum was recorded on the 400 MHz NMR Spectrometer in CDC13. Unknown 19 C NMR spectrum Refer to the information page on Assigning Carbon Environments for ¹³C NMR. Chemical shift (ppm) 149.6 146.9 124.6 20.9 Assignment dh By analysing the MS, ¹H NMR, ¹³C NMR and IR spectra, the unknown 19 compound is: 43