Go with the most obvious one first...
Carboxylic Acids: will have a really broad and large absorption range in the 3500-2500cm-1 area
(aka. the \"valley of the acid\") as well as a carbonyl peak in the 1700cm-1 area. That would be
spectrum 4.
Alcohols:will also have a strong and broad absorption in the 3500-3000cm-1 region, but nowhere
near as broad as the acid. It just looks like a really fat absorption line, rather than a well...
Anyway, the characteristic spectrum for the alcohol is spectrum 5.
Amines:lucky for you, the amine given in this question is a primary amine. There\'s going to be
two N-H stretching peaks in the 3300cm-1 region. There\'s also no carbonyl on the structure
given, so there should be no C=O stretching at 1700cm-1.This is spectrum 3. Don\'t worry about
the small absorption in the 1500-1700cm-1 area.
Now for the fine details...
The ester and aldehyde spectra are pretty similar, but aldehydes absorb at around 2750cm-1. It\'s
not totally clear on the spectra in the question but it looks like there\'s a 2750cm-1 absorption in
spectrum 2, so I\'d say that spectrum 2 is the aldehyde, and spectrum 1 is the ester.
Summary:
Spectrum 1 = structure B
Spectrum 2 = structure E
Spectrum 3 = structure C
Spectrum 4 = structure D
Spectrum 5 = structure A
Solution
Go with the most obvious one first...
Carboxylic Acids: will have a really broad and large absorption range in the 3500-2500cm-1 area
(aka. the \"valley of the acid\") as well as a carbonyl peak in the 1700cm-1 area. That would be
spectrum 4.
Alcohols:will also have a strong and broad absorption in the 3500-3000cm-1 region, but nowhere
near as broad as the acid. It just looks like a really fat absorption line, rather than a well...
Anyway, the characteristic spectrum for the alcohol is spectrum 5.
Amines:lucky for you, the amine given in this question is a primary amine. There\'s going to be
two N-H stretching peaks in the 3300cm-1 region. There\'s also no carbonyl on the structure
given, so there should be no C=O stretching at 1700cm-1.This is spectrum 3. Don\'t worry about
the small absorption in the 1500-1700cm-1 area.
Now for the fine details...
The ester and aldehyde spectra are pretty similar, but aldehydes absorb at around 2750cm-1. It\'s
not totally clear on the spectra in the question but it looks like there\'s a 2750cm-1 absorption in
spectrum 2, so I\'d say that spectrum 2 is the aldehyde, and spectrum 1 is the ester.
Summary:
Spectrum 1 = structure B
Spectrum 2 = structure E
Spectrum 3 = structure C
Spectrum 4 = structure D
Spectrum 5 = structure A.
Application of Matrices in real life. Presentation on application of matrices
Go with the most obvious one first...Carboxylic Acids will have a.pdf
1. Go with the most obvious one first...
Carboxylic Acids: will have a really broad and large absorption range in the 3500-2500cm-1 area
(aka. the "valley of the acid") as well as a carbonyl peak in the 1700cm-1 area. That would be
spectrum 4.
Alcohols:will also have a strong and broad absorption in the 3500-3000cm-1 region, but nowhere
near as broad as the acid. It just looks like a really fat absorption line, rather than a well...
Anyway, the characteristic spectrum for the alcohol is spectrum 5.
Amines:lucky for you, the amine given in this question is a primary amine. There's going to be
two N-H stretching peaks in the 3300cm-1 region. There's also no carbonyl on the structure
given, so there should be no C=O stretching at 1700cm-1.This is spectrum 3. Don't worry about
the small absorption in the 1500-1700cm-1 area.
Now for the fine details...
The ester and aldehyde spectra are pretty similar, but aldehydes absorb at around 2750cm-1. It's
not totally clear on the spectra in the question but it looks like there's a 2750cm-1 absorption in
spectrum 2, so I'd say that spectrum 2 is the aldehyde, and spectrum 1 is the ester.
Summary:
Spectrum 1 = structure B
Spectrum 2 = structure E
Spectrum 3 = structure C
Spectrum 4 = structure D
Spectrum 5 = structure A
Solution
Go with the most obvious one first...
Carboxylic Acids: will have a really broad and large absorption range in the 3500-2500cm-1 area
(aka. the "valley of the acid") as well as a carbonyl peak in the 1700cm-1 area. That would be
spectrum 4.
Alcohols:will also have a strong and broad absorption in the 3500-3000cm-1 region, but nowhere
near as broad as the acid. It just looks like a really fat absorption line, rather than a well...
Anyway, the characteristic spectrum for the alcohol is spectrum 5.
Amines:lucky for you, the amine given in this question is a primary amine. There's going to be
two N-H stretching peaks in the 3300cm-1 region. There's also no carbonyl on the structure
given, so there should be no C=O stretching at 1700cm-1.This is spectrum 3. Don't worry about
the small absorption in the 1500-1700cm-1 area.
2. Now for the fine details...
The ester and aldehyde spectra are pretty similar, but aldehydes absorb at around 2750cm-1. It's
not totally clear on the spectra in the question but it looks like there's a 2750cm-1 absorption in
spectrum 2, so I'd say that spectrum 2 is the aldehyde, and spectrum 1 is the ester.
Summary:
Spectrum 1 = structure B
Spectrum 2 = structure E
Spectrum 3 = structure C
Spectrum 4 = structure D
Spectrum 5 = structure A
