9. The proton NMR spectrum for a compound with formula C3H1,0 is shown below. The normal carbon-13 NMR spectrum has three peaks. The DEPT-135 and DEPT-90 spectral results are tabulated. Draw the structure of this compound. Normal Carbon DEPT-135 DEPT-90 26 ppm No peak No peak No peak Positive 36 No peak 84 Negative
Ideal and Real Gases
Ideal gases obey conditions of the general gas laws under all states of pressure and temperature. Ideal gases are also named perfect gases. The attributes of ideal gases are as follows,
Gas Laws
Gas laws describe the ways in which volume, temperature, pressure, and other conditions correlate when matter is in a gaseous state. The very first observations about the physical properties of gases was made by Robert Boyle in 1662. Later discoveries were made by Charles, Gay-Lussac, Avogadro, and others. Eventually, these observations were combined to produce the ideal gas law.
Gaseous State
It is well known that matter exists in different forms in our surroundings. There are five known states of matter, such as solids, gases, liquids, plasma and Bose-Einstein condensate. The last two are known newly in the recent days. Thus, the detailed forms of matter studied are solids, gases and liquids. The best example of a substance that is present in different states is water. It is solid ice, gaseous vapor or steam and liquid water depending on the temperature and pressure conditions. This is due to the difference in the intermolecular forces and distances. The occurrence of three different phases is due to the difference in the two major forces, the force which tends to tightly hold molecules i.e., forces of attraction and the disruptive forces obtained from the thermal energy of molecules.
Pavia book fifth edition ques no9 page 334
![2.07
4.03
5.93
2.0
0.5
0.0
Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part.
334
Nuclear Magnetic Resonance Spectroscopy • Part Two: Carbon-13 Spectra
9. The proton NMR spectrum for a compound with formula C3H10O is shown below. The normal
carbon-13 NMR spectrum has three peaks. The DEPT-135 and DEPT-90 spectral results are
tabulated. Draw the structure of this compound.
Normal Carbon
DEPT-135
DEPT-90
No peak
No peak
26 ppm
Positive
36
No peak
84
Negative
No peak
Proton spectrum
C3H1,0
4.02
5.95
50
2.5
2.0
1.5
1.0
0.5
10. The proton NMR spectrum for a compound with formula C3H10O3 is shown below. The nor-
mal carbon-13 NMR spectrum has four peaks. The infrared spectrum has a strong band at
1728 cm-1. The DEPT-135 and DEPT-90 spectral results are tabulated. Draw the structure of
this compound.
Normal Carbon
DEPT-135
DEPT-90
25 ppm
Positive
No peak
55
Positive
No peak
104
Positive
Positive
204
No peak
No peak
Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part.
Problems
335
Proton spectrum
C;H1,O3
1.01
6.14
3.02
3.0
2.5
2.0
1.5
1.0
0.5
0.0
11. The proton NMR spectrum for a compound with formula C,HgO is shown below. The normal
carbon-13 NMR spectrum has five peaks. The infrared spectrum has a strong band at 1746 cm-!.
The DEPT-135 and DEPT-90 spectral results are tabulated. Draw the structure of this compound.
Normal Carbon
DEPT-135
DEPT-90
44 ppm
Negative
No peak
125
Positive
Positive
127
Positive
Positive](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2bab6f14-2e86-4904-9fc5-bb90655cffc0%2F1b44e1d8-3a69-4d20-940c-61bb285d3d48%2F1euhn77_processed.jpeg&w=3840&q=75)
![2.07
4.03
5.93
2.0
0.5
0.0
Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part.
334
Nuclear Magnetic Resonance Spectroscopy • Part Two: Carbon-13 Spectra
9. The proton NMR spectrum for a compound with formula C3H10O is shown below. The normal
carbon-13 NMR spectrum has three peaks. The DEPT-135 and DEPT-90 spectral results are
tabulated. Draw the structure of this compound.
Normal Carbon
DEPT-135
DEPT-90
No peak
No peak
26 ppm
Positive
36
No peak
84
Negative
No peak
Proton spectrum
C3H1,0
4.02
5.95
50
2.5
2.0
1.5
1.0
0.5
10. The proton NMR spectrum for a compound with formula C3H10O3 is shown below. The nor-
mal carbon-13 NMR spectrum has four peaks. The infrared spectrum has a strong band at
1728 cm-1. The DEPT-135 and DEPT-90 spectral results are tabulated. Draw the structure of
this compound.
Normal Carbon
DEPT-135
DEPT-90
25 ppm
Positive
No peak
55
Positive
No peak
104
Positive
Positive
204
No peak
No peak
Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part.
Problems
335
Proton spectrum
C;H1,O3
1.01
6.14
3.02
3.0
2.5
2.0
1.5
1.0
0.5
0.0
11. The proton NMR spectrum for a compound with formula C,HgO is shown below. The normal
carbon-13 NMR spectrum has five peaks. The infrared spectrum has a strong band at 1746 cm-!.
The DEPT-135 and DEPT-90 spectral results are tabulated. Draw the structure of this compound.
Normal Carbon
DEPT-135
DEPT-90
44 ppm
Negative
No peak
125
Positive
Positive
127
Positive
Positive](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2bab6f14-2e86-4904-9fc5-bb90655cffc0%2F1b44e1d8-3a69-4d20-940c-61bb285d3d48%2Fcsaber9_processed.jpeg&w=3840&q=75)
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