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Chapter 14: Q.21558-14-36P (page 562)

Question: How many different types of protons are present in each compound?

Short Answer

Expert verified

Answer

a. The given compound has two different protons.

b. The given compound has seven different protons.

c. The given compound has five different protons.

d. The given compound has three different protons.

e. The given compound has three different protons.

f. The given compound has four different protons.

g. The given compound has six different protons.

h. The given compound has four different protons.

i. The given compound has three different protons.

j. The given compound has four different protons.

Step by step solution

01

1H NMR

1H NMR is a type of NMR spectroscopy using which various kinds of hydrogen atoms can be recognized.

02

Protons in the 1H NMR spectrum 

Protons found in distinct environments generate different signals. Equivalent protons exhibit the same kind of NMR signal.

03

Identifying the types of protons in each compound

a. In this compound, one carbon is connected to three other carbon atoms, each of which is attached to three hydrogen atoms. The central carbon atom gives rise to a multiplet, whereas other carbon atoms produce doublets.

Hence, the given compound has two different protons.

Different protons in compound a

b. Different protons are represented as , Ha,Hb ,Hc ,Hd ,He,Hf and Hg. The given compound contains seven types of protons.

Different protons in compound b

c. Different protons are represented as ,Ha,Hb ,Hc ,Hd , and He . Hence, the given compound has five types of protons.

Different protons in compound c

d. Different protons are represented as ,Ha,Hb ,and Hc . in this compound. Hence, this compound has three types of protons.

Different protons in compound d

e. Different protons are represented as ,Ha,Hb ,and Hc . Hence, the compound contains three types of protons.

Different protons in compound e

f. The different protons are represented as , Ha,Hb ,Hc and,Hd . Hence, the given compound contains four types of protons.

Different protons in compound f

g. The different protons are represented as , Ha,Hb ,Hc ,Hd ,He, and Hf .Hence, the given compound has seven kinds of protons.

Different protons in compound g

h. The different protons are represented as ,Ha,Hb ,Hc ,and Hd . Hence, the given compound has four types of protons

Different protons in compound h

i. The different protons are represented as , Ha,Hb and Hc .in this compound. Hence, this compound has three types of protons.

Different protons in compound i

j. The different protons are represented as , Ha,Hb ,Hc ,and Hd . Hence, the given compound has four types of protons

Different protons in compound j

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Most popular questions from this chapter

Question: The \(^{\bf{1}}{\bf{H}}\) NMR spectrum 1,2-dimethoxyethane \(\left( {{\bf{C}}{{\bf{H}}_{\bf{3}}}{\bf{OC}}{{\bf{H}}_{\bf{2}}}{\bf{C}}{{\bf{H}}_{\bf{2}}}{\bf{OC}}{{\bf{H}}_{\bf{3}}}} \right)\) recorded on a 300 MHz NMR spectrometer consists of signals at 1017 Hz and 1065 Hz downfield from TMS. (a) Calculate the chemical shift of each absorption. (b) At what frequency would each absorption occur if the spectrum were recorded on a 500 MHz NMR spectrometer?

For each compound, first label each different type of proton and then rank the protons in order of increasing chemical shift.

a.

b.

c.

Question: For each compound, first label each different type of proton and then rank the protons in order of increasing chemical shift.

a.

b.

c.

Identify the carbon atoms that give rise to the signals in the \)^{{\bf{13}}}{\bf{C}}\) NMR spectrum of each compound.

a. \){\bf{C}}{{\bf{H}}_{\bf{3}}}{\bf{C}}{{\bf{H}}_{\bf{2}}}{\bf{C}}{{\bf{H}}_{\bf{2}}}{\bf{C}}{{\bf{H}}_{\bf{2}}}{\bf{OH}}\); \)^{{\bf{13}}}{\bf{C}}\) NMR: 14, 19, 35, and 62 ppm

b. \){\left( {{\bf{C}}{{\bf{H}}_{\bf{3}}}} \right)_{\bf{2}}}{\bf{CHCHO}}\); \)^{{\bf{13}}}{\bf{C}}\) NMR: 16, 41, and 205 ppm

c. \){\bf{C}}{{\bf{H}}_{\bf{2}}}{\bf{ = CHCH}}\left( {{\bf{OH}}} \right){\bf{C}}{{\bf{H}}_{\bf{3}}}\); \)^{{\bf{13}}}{\bf{C}}\) NMR: 23, 69, 113, and 143 ppm

Question: How could you use chemical shift and integration data in 1H NMR spectroscopy to distinguish between CH3OCH2CH2OCH3and CH3OCH2OCH3? The 1H NMR spectrum of each compound contains only singlets.
See all solutions

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