(a) Explain NOE and how it can be applied to 2D-NMR. Assign peaks (chemical shift values) to 1-nitronaphthalene.

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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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( do 14 a )
From the attached 'H NOESY spectrum,
(b) An
molecular formula C12H3B12. Identify
the compound using the spectroscopic
data given :
organic
compound
has
the
'H-NMR : 88-57, 8·21, 8·12, 7-95, 7·71,
7.61 and 7·53 ppm.
'H NOESY spectrum of 1-nitronaphthalene
UV-vis : Amax = 264 nm (logio = 4:5)
(recorded in CDC1, solution at 298 K at 400 MHz)
IR : y (KBr disc) at 1499 cm¯(s)
Hg NO2
H7
H2
'H-NMR (CDC13) :
H6
H5
`H3
H4
87-55 (d), 7:38 (d), ppm
13 C-NMR (CDC13) :
8 140-0, 130·3, 130·0, 120-3 ppm
MS m/z : 152 (M',100), 76 (40)
'H-'H NOESY Spectrum
(400 MHz: COCI, solution)
ppm
7.4
露 鬼
7.6
Briefly describe the various parameters
for the generation of 2D-NMR data apart
from preparation and detection (relevant
to 1D-NMR). What are the advantages of
(c)
7.8
8.0
Fourier transformed FID?
8.2
8.4
14. (a) Explain NOE and how it can be applied
to 2D-NMR. Assign peaks (chemical
1-nitronaphthalene.
8.6
shift values)
to
8.6
8.4
8.2
8.0
7.8
7.6
7.4
ppm
Transcribed Image Text:From the attached 'H NOESY spectrum, (b) An molecular formula C12H3B12. Identify the compound using the spectroscopic data given : organic compound has the 'H-NMR : 88-57, 8·21, 8·12, 7-95, 7·71, 7.61 and 7·53 ppm. 'H NOESY spectrum of 1-nitronaphthalene UV-vis : Amax = 264 nm (logio = 4:5) (recorded in CDC1, solution at 298 K at 400 MHz) IR : y (KBr disc) at 1499 cm¯(s) Hg NO2 H7 H2 'H-NMR (CDC13) : H6 H5 `H3 H4 87-55 (d), 7:38 (d), ppm 13 C-NMR (CDC13) : 8 140-0, 130·3, 130·0, 120-3 ppm MS m/z : 152 (M',100), 76 (40) 'H-'H NOESY Spectrum (400 MHz: COCI, solution) ppm 7.4 露 鬼 7.6 Briefly describe the various parameters for the generation of 2D-NMR data apart from preparation and detection (relevant to 1D-NMR). What are the advantages of (c) 7.8 8.0 Fourier transformed FID? 8.2 8.4 14. (a) Explain NOE and how it can be applied to 2D-NMR. Assign peaks (chemical 1-nitronaphthalene. 8.6 shift values) to 8.6 8.4 8.2 8.0 7.8 7.6 7.4 ppm
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