3310 IR Spectrum (quid m 4000 100 BO % of base peak 3000 40 13C NMR Spectrum (100 0 MHz, CDC, solution) 80 DEPT CH₂ CH CH proton decoupled 200 ¹H NMR Spectrum (200 MHz. CDCI, solution) 10 9 8 mp 2000 1600 1200 106 120 v (cm¹) m/e 160 160 7 M 197 200 6 expansion 128 ppm expansion 129 128 ppm 129 120 800 Mass Spectrum CH5N 240 280 5 solvent 80 st 4 Problem 37 3 40 0 exchanges with D₂0 £ 2 1 8 (ppm) TMS L 0 8 (ppm)

3310 IR Spectrum (quid m 4000 100 BO % of base peak 3000 40 13C NMR Spectrum (100 0 MHz, CDC, solution) 80 DEPT CH₂ CH CH proton decoupled 200 ¹H NMR Spectrum (200 MHz. CDCI, solution) 10 9 8 mp 2000 1600 1200 106 120 v (cm¹) m/e 160 160 7 M 197 200 6 expansion 128 ppm expansion 129 128 ppm 129 120 800 Mass Spectrum CH5N 240 280 5 solvent 80 st 4 Problem 37 3 40 0 exchanges with D₂0 £ 2 1 8 (ppm) TMS L 0 8 (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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plese don't handwritten solution... What MS resolving power is needed to fully resolve the C8H8NO2 and C7H6N2O2 ions (at the base peaks)?
A H1 NMR signal is observed at 117.0 Hz (downfield of TMS) on a 1.20×102‑MHz instrument. a) What is the observed chemical shift in parts per million (ppm)? Chemical shift is ppm b) What is the chemical shift, in parts per million (ppm), if the sample is analyzed with a 60.0‑MHz instrument? Chemical shift is ppm c) Where will the proton signal appear, in hertz, if the sample is analyzed with a 60.0‑MHz instrument?
what is the purpose y the result of Spectrophotometric of a Cobalt Chloride Solution Analysis? Table 1 Absorption Spectrum of Cobalt Chloride Using a Spectrophotometer Wavelength Absorbance 400 410 420 430 440 450 460 370 480 490 500 510 520 530 540 550 560 570 580 590 600 610 620 630 640 650 660 670 680 690 700 0.036 0.044 0.063 0.095 0.147 0.215 0.284 0.329 0.362 0.402 0.450 0.479 0.464 0.398 0.314 0.216 0.142 0.087 0.054 0.041 0.036 0.036 0.034 0.028 0.030 0.023 0.023 0.023 0.014 0.014 0.011 Test Tube Number Cobalt Chloride Concentration (mol/mL) Absorbance at 510 nm 1 0.000 0.000 2 0.009 0.042 3 0.018 0.92 4 0.027 0.139 5 6 0.036 0.045 0.190 0.236 7 (Unknown) 0.151
please answer subparts 4,5,6
1. For each set of spectral data, propose an acceptable structure that is consistent with the data. a. MS: M+ m/z=71, IR: 3340, 2960, 2870 cm-1 , 13C NMR: 47.20 (CH2), 25.64 (CH2) ppm b. MS: M+ m/z= 102, IR: 2960, 2870 cm-1, 13C NMR: 72.73 (t), 23.20 (t), 10.80 (q) ppm c. MS: M+ m/z=74, IR: 3310, 2960, 2870 cm^-1, 13C NMR: 62.44 (down), 34.86 (down), 18.98 (down), 13.88 (up) ppm (DEPT-direction) d. MS: M+ m/z=92 (M:M+2=3:1), IR: 2960, 2870 cm^-1, 13C NMR: 67.29 (C), 34.46 (CH3) ppm e. MS:M+ m/z=70, IR: 3070, 2960, 2870, 1666 cm^-1, 13C NMR: 138.92 (t), 114.26 (d), 35.96 (t), 22.17 (t), 13.59 (q) ppm f. MS: M+ m/z= 72, IR: 2960, 2870 cm^-1, 13C NMR: 31.68 (t), 29.80 (d), 22.20 (q), 11.69 (q) ppm g. MS: M+ m/z= 84, IR: 2960, 2870, 1734 cm^-1, 13C NMR: 220.16 (C), 38.30 (CH2), 23.24 (CH2) ppm h. MS:M+ m/z= 138, (M:M+2=1:1), IR: ~3010(broad), 1715 cm^-1, 13C NMR: 173.61(s), 25.21(t) ppm i. MS:M+ m/z=88, IR: 2960, 2870, 1736cm^-1, 13C NMR: 170.95 (C), 60.34 (CH2), 20.98 (CH3), 14.23 (CH3)…
For each set of spectral data, propose an acceptable structure that is consistent with the data 1.. MS: M+ m/z=92 (M:M+2=3:1), IR: 2960, 2870 cm^-1, 13C NMR: 67.29 (C), 34.46 (CH3) ppm 2.. MS:M+ m/z=70, IR: 3070, 2960, 2870, 1666 cm^-1, 13C NMR: 138.92 (t), 114.26 (d), 35.96 (t), 22.17 (t), 13.59 (q) ppm 3.. MS: M+ m/z= 72, IR: 2960, 2870 cm^-1, 13C NMR: 31.68 (t), 29.80 (d), 22.20 (q), 11.69 (q) ppm
Using a 300 MHz NMR instrument: a.How many Hz downfield from TMS is a signal at 2.5 ppm? b. If a signal comes at 1200 Hz downfield from TMS, at what ppm does it occur? c.If two signals are separated by 2 ppm, how many Hz does this correspond to?
MS: m/z=148 (M,100%),149 (11%) IR (liquid film): 3077‐2835 (multitude of weak peaks) 1640(m),1611(m),1511(s),1301(m),1247(s),1176(s),1038(s),922(m),914(m) and 810(m)cm^-1 There are no absorptions in the 3100-‐4000cm^-1 region of the spectrum. (m=medium absorption, s=strong absorption). Choose (circle) the best structure for estragole (W) from the four possible structures (1-4)shown below. Explain briefly how you eliminated each of the incorrect structures for W.
How do I solve for [FeSCN2+] heres the formula they provided me and my data but I would like steps on how to solve it and what data I should be using to solve for it u can use any fake numbers you need to help me understand ! I'm confused only by the absorbance part , what number am I using for the absorbance? Is it Fe3+ added to ScN- absorbance values ? also e = 202 and L = 1.0
For each set of spectral data, propose an acceptable structure that is consistent with that data 1.. MS: M+ m/z= 84, IR: 2960, 2870, 1734 cm^-1, 13C NMR: 220.16 (C), 38.30 (CH2), 23.24 (CH2) ppm 2. MS:M+ m/z= 138, (M:M+2=1:1), IR: ~3010(broad), 1715 cm^-1, 13C NMR: 173.61(s), 25.21(t) ppm 3. MS:M+ m/z=88, IR: 2960, 2870, 1736cm^-1, 13C NMR: 170.95 (C), 60.34 (CH2), 20.98 (CH3), 14.23 (CH3) ppm 4. MS: M+ m/z=73, IR: 3410, 2960, 2870, 1668 cm^-1, 13C NMR: 171.27 (C), 26.26 (CH3), 22.87 (CH3) ppm
Answer Q40, 41, 42 showing detailly all explanations
Using a 300 MHz NMR instrument:a. How many Hz downfield from TMS is a signal at 2.5 ppm?b. If a signal comes at 1200 Hz downeld from TMS, at what ppm does it occur?c. If two signals are separated by 2 ppm, how many Hz does this correspond to?