Below are three MS spectra, Spectra 1, 2, and 3. Each of this mass spectrum corresponds to either Compound A (contains one Cl in the molecular formula), Compound B (one I in the molecular formula), and Compound C (one Br in the molecular formula). Identify which spectra corresponds to which compound. Provide explanations for your choices

Below are three MS spectra, Spectra 1, 2, and 3. Each of this mass spectrum corresponds to either Compound A (contains one Cl in the molecular formula), Compound B (one I in the molecular formula), and Compound C (one Br in the molecular formula). Identify which spectra corresponds to which compound. Provide explanations for your choices

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

Chapter15: Molecular Luminescence Spectrometry

Section: Chapter Questions

Problem 15.2QAP

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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.
Lable Xrd planes peaks
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Infrared Spectroscopy (IR) is very useful for determining the functional groups present in an organic molecule. For each of the spectra below, complete the following: • Build the molecule in Spartan and describe the motion of the molecule at each key absorption frequency • Identify key absorption frequencies in the spectrum and identify the type of stretch/bend/wag/etc. (i.e. O-H) • Match the spectra from the provided structures • Identify the main functional groups in the molecule OH A OH H B E F H N NH2
Match each of the following compounds to one of the IR spectra shown below. .CI (а) OH (b) (c)
0.8 0.6 0.4 0.2 0.0 3000 2000 1000 Wavenumber (cm-1) ОН NH2 `NH2 A В C Transmitance
2 infrared spectra are on the back of this page. a. Draw an arrow to the O-H peak and label it. b. Draw an arrow to the C=O peak and label it.
▼ ▼ Part A In the rotational spectrum of H³5Cl (I= 2.65 x 10-47 kg m²), the transition corresponding to the J = 4 to J = 5 transition is the most intense. At what temperature was the spectrum obtained? Express the temperature in kelvins to three significant figures. ΠΫΠΙ ΑΣΦ T = Submit Part B J= Request Answer At 1000. K, which rotational transition of H³5 Cl would you expect to demonstrate the greatest intensity? Express your answer as an integer. V—| ΑΣΦ Submit Request Answer K ?
Absorption What type of transition is induced by the electromagnetic radiation mostly absorbed by these substances? -12 1.5 L4-20 min L6-30 min 1.2 -L8-50 min Original 0.9 0.6 0.3 400 450 500 550 600 650 700 750 S00
Spectrum 99 97 95 93 91 89 87 85 83 81 79 77 4000 3500 3000 2500 2000 1500 1000 500 Wave Number (cm-1) Band Intensity Assigned to the link Frequency (cm-l) Vibrational mode W % de transmittance