IR Spectrum (KBr disc) T 2249 4000 100만 80 60 40 20 2 2 2 2 % of base peak 3000 2000 1600 1200 800 V (cm³) 53 40 M+* = 80 Problem 7 Mass Spectrum No significant UV absorption above 220 nm C4H4N2 40 80 120 160 200 240 280 m/e 13C NMR Spectrum (100.0 MHz, CDCl 3 solution) DEPT CH2 CH CH proton decoupled solvent 200 160 120 80 40 0 8 (ppm) 1H NMR Spectrum (400 MHz, CDCl 3 solution) 10 1 9 96 8 00 7 60 5 4 3 2 TMS 0 § (ppm)

IR Spectrum (KBr disc) T 2249 4000 100만 80 60 40 20 2 2 2 2 % of base peak 3000 2000 1600 1200 800 V (cm³) 53 40 M+* = 80 Problem 7 Mass Spectrum No significant UV absorption above 220 nm C4H4N2 40 80 120 160 200 240 280 m/e 13C NMR Spectrum (100.0 MHz, CDCl 3 solution) DEPT CH2 CH CH proton decoupled solvent 200 160 120 80 40 0 8 (ppm) 1H NMR Spectrum (400 MHz, CDCl 3 solution) 10 1 9 96 8 00 7 60 5 4 3 2 TMS 0 § (ppm)

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter20: Molecular Mass Spectrometry

Section: Chapter Questions

Problem 20.11QAP

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VV) 8 8 7 18) Chemical Formula: C9H₁20 IR: Strong broad peak at 3200 cm-¹ 5H 5 6 -10 1H 4 PPM 1H 3 PPM ~ 9x2=18+2=20=12=8/2=4 -3 2H N- → −2 O 3H
Intensity (a.u.) 4000 3352 cm¹ 3500 3000 UNKNOWN B 1710 cm¹ 2000 1668 cm¹ 2500 Wavenumber (cm¹¹) 1500 1101 cm 1000 500
8 11) Chemical Formula: C₁0H12O2 IR: strong peak 1720cm-¹ 10 1H 8 12) Chemical Formula: C9H200 IR: strong broad 3300cm-1 2H 2H PPM 10x2= 20+2=22=12=10/2=5 6 PPM septet 1H 9x2=18+2=20-20=0 2 0 6H
6. C8H100 11 TRANSMITTANCE LOD HSP-04-492 0+ 10 4000 9 3000 8 5 7 6 : 5 ppm 2000 4 HAVENUMBERI-l 2: 2 1 3 1500 2 سهر 1 1000 0 500 200 T 180 CDS-06-431 DEPT-90 T 160 DEPT-135 140 120 100 لك -2 peaks u ppm 80 60 40 20 0
Chemistry 58 un 5 5 498 998 ¥ a ल OOGL 0OSZ 3000 3500 Navenumbers (cm-1) Please annotate this IR and label ALL peaks
43 184 IR Spectrum (Iquid film) 4000 3000 100 80 60 40 20 40 13C NMR Spectrum (100.0 MHz, CDCI, solution) 9 80 DEPT CH₂ CH₂4 CHA proton decoupled 200 ¹H NMR Spectrum (400 MHz CDCI, solution) expansion 7.5 7.3 ppm 8 P 10 SAMSUNG Galaxy A53 5G 2000 1600 V (cm) 105 M+- 134 120 160 m/e 160 09b0f2ca-eac1-4... 1200 T L 120 2.8 2.7 ppm 7 6 ww 800 Mass Spectrum C10H14 200 240 280 T 1 5 solvent " 80 expansions 1.8 1.7 ppm 1 4 3:54 م 0 *1 470 صفحة Problem 96 UV Spectrum max 260 nm (log10=2.5) PE 40 1.45 1.35 ppm 3 2 Problem 97 08 (ppm) expansion 1.05 0.95 TMS I 0 8 (ppm) 1 202 تمشح بـ 100 جيجابايت تخزين على OneDrive cloud لمدة 6 أشهر 185.
COMPOUND 1 INFRARED SPECTRUM 4800 3000 2000 1500 s000 MRVEMUSERI 1906 77 1598 S0 1819 1492 20 1366 1166 77 108? 21 B16 38 798 21 712 50 707 S4 SA7 B4 3270 21 56 1358 53 1345 50 1299 1238 9259 21 COMPOUND 1 2955 74 1029 2939 68 17 66 2924 2054 2727 4. 1454 1408 1378 1209 838 26 42 53 1176 24 10 656 67 49 833 25 620 50
Concentration of FeSCN2+ Absorbance (Y axis) Percent Transmittance (%T) (X axis) 100 1.00E-04 0.495 32 2.00E-04 0.955 11.1 3.00E-04 1.398 Calibration Curve (Absorbance vs. Concentration of FESCN²*) 1.6 1.4 y = 4713.6x. 1.2 1 0.8 0.6 0.4 0.2 0.00005 0.0001 0.00015 0.0002 0.00025 0.0003 0.00035 Concentration of FeSCN²+ Absorbance
Transmittance (%) 100% 75% 50% 25% 0% 4000 3500 3000 OH 2500 2000 Spectrum 3B 1750 حسيمة 1500 Wavenumber (cm-¹) 1250 .OH 1000 OH 750 500
100 - 80 60 40 20 10 15 20 25 30 35 40 45 50 55 60 m/z Absorbance / % 50- 100+ 4000 3000 2500 2000 1500 1000 500 Wavenumbers / cm Relative Intensity / %
QUESTION 5 The IR, 'H NMR and 1°C NMR spectra of compound P are shown below. The molecular formula for compound P is CsH;NO2. Identify three (3) important absorption peaks on the IR spectrum and indicate the bond and wavenumber associated with each peak. Elucidate the structure of compound P and assign each peak in the 'H and 13C NMR spectra. (Hint: The compound consists of more than one functional group). а. b.
опанит 1715 1600 IR Spectrum 100 4000 (liquid film) 43 80 75 60 M 40 20 % of base peak 10 3000 40 C 13C NMR Spectrum (20.0 MHz, CDCI solution) proton decoupled 9 80 200 ¹H NMR Spectrum (100 MHz, CDCI, solution) 101 8 2000 v (cm¹) M** 132 120 160 m/e 160 7 6 1200 120 Mass Spectrum 200 240 280 800 C-H 5 C6H1203 solvent L 80 4 -CH3 No significant UV absorption above 220 nm 3 H-C-H u -CH3 40 2 59 TMS 0 1 8 (ppm) TMS 0 8 (ppm)