(а) The IR spectrum below shows the important absorption bands for compound A (C7H1402). Its 'H NMR spectrum shows only singlets at dH 1.3, 2.3, 3.9 and 8.5 with the integration ratio of 9:2:2:1. Using all the spectral data, deduce the structure of compound A. 100 2898 2986 1718 3446 1150 0+ 4000 3000 2000 1500 1000 500 wavenumber Transmittance

(а) The IR spectrum below shows the important absorption bands for compound A (C7H1402). Its 'H NMR spectrum shows only singlets at dH 1.3, 2.3, 3.9 and 8.5 with the integration ratio of 9:2:2:1. Using all the spectral data, deduce the structure of compound A. 100 2898 2986 1718 3446 1150 0+ 4000 3000 2000 1500 1000 500 wavenumber Transmittance

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

A compound A of mass 114 has the following elemental analysis: C = 63.14%, H=8.83%. The IR, 1H NMR and 13C NMR spectra are given below. 1) Assign and interpret all the data from the 1H NMR and 13C NMR spectra. Propose a formula for A. 7.0 175 с 3000 1,3; 13 I=1 6.0 150 I=1 с 5.0 CH₂ 125 2000 Explain why the answer is this one : CH,—CH,—0 4,2; 60 mavermy I=2 cm-1 4.0 100 1500 3.0 75 135 167 | CH₂ 6 125 CH 3 1,95 ; 18 I=3 1000 2.0 50 H 5,5 I=3 1.0 CH₂ CH₂ 25 500 Ppm ppm
Shown are the H NMR spectra for 2 isomeric compounds three and four of the formula C5H10O. The IR spectrum of both have an absorption in the region of 1700 to 1730 cm-1. Provide the structure for each compound, and which hydrogen atoms give rise to the peaks in each spectrum. The peak at 7.27 ppm can be ignored, and the red numbers are integration values.
(a) Compound A has molecular formula C5H10O. It shows three signals in the 1H-NMR spectrum - a doublet of integral 6 at 1.1 ppm, a singlet of integral 3 at 2.14 ppm, and a quintet of integral 1 at 2.58 ppm. Suggest a structure for A and explain your reasoning. (b) Compound B has molecular formula C8H6O2. The IR, 1H-NMR, and 13C-NMR spectra are shown below, they are also downloadable for closer inspection by clicking the link under the spectral data. Suggest a structure for B and explain your reasoning. (c) Compound C has molecular formula C5H8O. The IR, mass, 1H-NMR, and 13C-NMR spectra are shown below, they are also downloadable for closer inspection by clicking the link under the spectral data. Suggest a structure for C and explain your reasoning.
An unknown compound with molecular formula C9H180 forms a phenylhydrazone, but gives a negative with Tollens' test. The IR spectrum has a strong band near 1710 cm. The broadband proton- decoupled "C NMR spectrum is given below. Propose a structure for the unknown compound. Explain your answer based on the given spectroscopic data CH3 A, C3H180 CH2 CH CDCI3 TMS 220 200 180 160 140 120 100 80 60 40 20 S, (ppm)
An organic compound B with formula C6H14O has the following: IR Spectroscopy 2974 cm-1, 1080 cm-1 Mass Spectrometry 102 (M+), 87, 73 1H NMR Spectroscopy Eight signals at δ 1.10 (d, 3H), 1.13 (dd, 3H), 1.14 (dd, 3H), 1.59 (ddq, 1H), 1.60 (ddq, 1H), 3.19 (ddq, 1H), 3.51 (dq, 1H), 3.50 (dq, 1H). Compound B is obtained by the reaction of compound A with NaH followed by CH3CH2Br. The stereochemistry of A is "S" Using this information, deduce a plausible structure for Compound A with correct stereochemistry.
Click the "draw structure" button to launch the drawing utility. Propose a structure for D (molecular formula C,H9CIO2) consistent with the given spectroscopic data. 13C NMR signals at 30, 36, 128, 130, 133, 139, and 179 ppm. 1Η NMR of D 4 H 2 H 2 H 1H 12 10 8 4 ppm 2. CO
Compound B of molecular formula C9H19N shows a noteworthy infrared absorption at 3300 cm-1. Its 1H-NMR spectrum shows three singlets – δ 1.0 (6H), 1.1 (12H), 1.4 (1H) ppm. Its 13C-NMR spectrum has four signals – δ 25, 28, 41, 64 ppm. Suggest a structure for this compound. Please show work.
Compound T has the formula C4H,CIO₂. The ¹H NMR, 13C NMR and the IR spectra for Compound T are shown below. Propose a structure for Compound T. (IR is on the next page.) 9 HSP-49-250 DEPT-90 DEPT-135 8 200 7 6 CDS-12-114 Jelle 5 180 160 140 1:3 ppm 4 120 100 : 2 peaks ppm 3 80 2 peaks 2 3 1 bissa owi zar 60 40 0 20 -1 peak 0 anic
On the basis of the molecular formula, 1H NMR data, and IR data provided, propose a consistent structure. Moleculal Formula: C2H3Cl31H NMR data: δ 3.95 (d, 2H), 5.77 (t, 1H)IR data: 2950 cm–1, and several peaks below 820 cm–1.
Compound Y (molecular formula C6H10) gives four lines in its 13C NMR spectrum (27, 30, 67, and 93 ppm) and the IR spectrum given here. Propose a structure for Y.
Reaction of (CH3)2CO with LiCCH followed by H2O gives compound X, which has a molecular ion in the mass spectrum at 84. It also has prominent absorptions in the IR spectrum at 3600-3200, 3303, 2938, and 2120 cm-1. The proton NMR shows a singlet at 1.53 (6H), a singlet at 2.37 (1H) and a singlet at 2.43 (1H). What is the structure for compound X?