Homework Answers
After the distillation the collected fraction will have methanol If it shows the following peaks in the IR spectrum,
C-H stretch at 2990-2850 cm-1 [this is typical for aliphatic C-H stretchings]
O-H stretch at 3200-3500 cm-1 i[this is due to the intermolecular H-bonding present between methanol molecules]
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After a distillation a student runs an IR of their compound. The student thinks it is...
After a distillation a student runs an IR of their compound. The student thinks it is...
After a distillation a student runs an IR of their compound. The student thinks it is pyrrole. Which stretches in the spectrum might lead the student to make this conclusion? (you can select multiple boxes) a) C=C stretch at 1650-1600 cm^-1 b) O-H stretch at 3200-3500 cm^-1 c) C=O stretch at 1710 cm^-1 d) N-H stretch at 3550-3250 cm^-1
1. A student carried out a simple distillation on a compound known to boil at 124°C...
1. A student carried out a simple distillation on a compound known to boil at 124°C and reported an observed boiling point of 116°-117°C. TLC comparison of the product showed that the compound was pure, and a calibration of the thermometer indicated that it was accurate. What procedural error might the student have made in setting up the distillation apparatus? 2. Which method is better for purifying a mixture of two liquids that boil at nearly the same temperature: simple...
LThe structure of a compound and its IR spectrum are given below List all the bond...
LThe structure of a compound and its IR spectrum are given below List all the bond types in this molecule that you would expect to observe in the IR spectrum-include both stretches and bends. [6 pts Clearly label on the spectrum which peak corresponds to cach bond type. [6 pts 2 Circle the compound that best fits the IR spectrum for cach part. [3 pts each b) fracr CHe 1. The structure of a compound and its IR spectrum are...
Which compound matches the IR spectrum best? Which compound matches the IR spectrum best?
Which compound matches the IR
spectrum best?
Which compound matches the IR spectrum best?
b. NMR and IR When the second student runs a 'H NMR of the reaction (shown...
b. NMR and IR When the second student runs a 'H NMR of the reaction (shown below) the compound present appears to be rl 8.0 7.5 7.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0s ppm Fill in the missing data in the table below as it pertains to the second student's 'H NMR spectrum above c. Proton peak Integration Chemical Shift Neighbors (n) Splitting pattern (n+) (ppm) 2.4 Report as singlet/doublet/triplet/ete. triplet singlet multiplet な 1.6 0.9 3....
yuLLIUI The IR and 'H-NMR spectrum of a compound with molecular formula 102 is provided below....
yuLLIUI The IR and 'H-NMR spectrum of a compound with molecular formula 102 is provided below. What is its unsaturation number identify the key functional groups from the IR spectrum and explicitly state which stretches (with wavenumber) were used to identify them. Name or provide the condensed structure of a compound that will give rise to the above data (15 pts.) IR H-NMR-doublet - 79 ppm-2H, doublet - 7.3 ppm - 2H. quartet - 2.7 ppm - 2 triplet -1.2...
ir Which compound matches the IR spectrum?
ir
Which compound matches the IR spectrum?
8. (1 pt.) A student wants to run an IR spectrum of a sample. The student...
8. (1 pt.) A student wants to run an IR spectrum of a sample. The student knows that the sample is an aromatic ketone, but gets the spectrum shown below, which is not of an aromatic ketone and not what they expected. The student was in a hurry and forgot to do something important when running the spectrum. Based on the functional group you see in the spectrum, what did they forget to do? 18
8. (1 pt.) A student...
Which compound matches the IR spectrum?
Which compound matches the IR spectrum?
Which compound matches the IR spectrum
Which compound matches the IR spectrum
1. A student carried out a simple distillation on a compound known to boil at 124°C and reported an observed boiling point of 116°-117°C. TLC comparison of the product showed that the compound was pure, and a calibration of the thermometer indicated that it was accurate. What procedural error might the student have made in setting up the distillation apparatus? 2. Which method is better for purifying a mixture of two liquids that boil at nearly the same temperature: simple...
LThe structure of a compound and its IR spectrum are given below List all the bond types in this molecule that you would expect to observe in the IR spectrum-include both stretches and bends. [6 pts Clearly label on the spectrum which peak corresponds to cach bond type. [6 pts 2 Circle the compound that best fits the IR spectrum for cach part. [3 pts each b) fracr CHe 1. The structure of a compound and its IR spectrum are...
Which compound matches the IR
spectrum best?
Which compound matches the IR spectrum best?
b. NMR and IR When the second student runs a 'H NMR of the reaction (shown below) the compound present appears to be rl 8.0 7.5 7.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0s ppm Fill in the missing data in the table below as it pertains to the second student's 'H NMR spectrum above c. Proton peak Integration Chemical Shift Neighbors (n) Splitting pattern (n+) (ppm) 2.4 Report as singlet/doublet/triplet/ete. triplet singlet multiplet な 1.6 0.9 3....
yuLLIUI The IR and 'H-NMR spectrum of a compound with molecular formula 102 is provided below. What is its unsaturation number identify the key functional groups from the IR spectrum and explicitly state which stretches (with wavenumber) were used to identify them. Name or provide the condensed structure of a compound that will give rise to the above data (15 pts.) IR H-NMR-doublet - 79 ppm-2H, doublet - 7.3 ppm - 2H. quartet - 2.7 ppm - 2 triplet -1.2...
ir
Which compound matches the IR spectrum?
8. (1 pt.) A student wants to run an IR spectrum of a sample. The student knows that the sample is an aromatic ketone, but gets the spectrum shown below, which is not of an aromatic ketone and not what they expected. The student was in a hurry and forgot to do something important when running the spectrum. Based on the functional group you see in the spectrum, what did they forget to do? 18
8. (1 pt.) A student...
Which compound matches the IR spectrum?
Which compound matches the IR spectrum
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