1) What would be the partial interpretation (concerning the number of chemically equivalent hydrogen atoms in...
1) What would be the partial interpretation (concerning the number of chemically equivalent hydrogen atoms in a molecule) of a doublet which integrates for 1 H and is located at 11 in the 1H NMR? For this question, consider only the integration of the peak.
| CH3 |
| CH |
| 2 equivalent CH2 |
| CH2 |
| 2 equivalent CH |
2) Which of these choices best describes the interpretation of a 1H NMR spectral peak that was recorded as 1.0 (9H, s)? The underlined hydrogen atom is intended to be the one producing the peak that we are interpreting.
| CH-CH |
| CH2-C |
| CH3-C |
| 2 equivalent CH3-C groups |
| 3 equivalent CH3-C groups |
| None of these interpretations describes this peak. |
3) Which of these choices best describes the interpretation of a 1H NMR spectral peak that was recorded as 0.95 (3H, t)? The underlined hydrogen atom is intended to be the one producing the peak that we are interpreting.
| CH-CH2 |
| CH2-CH2 |
| CH3-CH2 |
| CH2-CH2-CH2 |
| CH3-CH2-CH3 |
| None of these interpretations describes this peak. |
4)
What would be the partial interpretation (concerning the number of chemically equivalent hydrogen atoms in a molecule) of a triplet which integrates for 2 H and is located at 2.5 in the 1H NMR? For this question, consider only the integration of the peak.
| 2 equivalent CH2 |
| CH |
| CH2 |
| CH3 |
| 2 equivalent CH |
5)
Which of these choices best describes the interpretation of a 1H NMR spectral peak that was recorded as 4.7 (1H, quartet)? The underlined hydrogen atom is intended to be the one producing the peak that we are interpreting.
| CH-CH3 |
| 2 equivalent CH-CH3 groups |
| CH3-CH |
| CH2-CH3 |
| CH3-CH2-CH3 |
| None of these interpretations describes this peak. |
Homework Answers
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1) What would be the partial interpretation (concerning the
number of chemically equivalent hydrogen atoms in...
1) Which of these choices best describes the interpretation of a 1H NMR spectral peak that...
1) Which of these choices best describes the interpretation of a 1H NMR spectral peak that was recorded as 1.85 (2H, t)? The underlined hydrogen atom is intended to be the one producing the peak that we are interpreting. CH-CH2 CH2-CH2 CH3-CH2 CH2-CH2-CH2 CH3-CH2-CH3 None of these interpretations describes this peak. 2) What would be the partial interpretation (concerning the number of chemically equivalent hydrogen atoms in a molecule) of a doublet which integrates for 1 H and is located at...
What would be the partial interpretation (concerning the number of chemically equivalent hydrogen atoms in a...
What would be the partial interpretation (concerning the number of chemically equivalent hydrogen atoms in a molecule) of a singlet which integrates for 2 H and is located at 2.1 in the 1H NMR? For this question, consider only the integration of the peak. Explain. 2 equivalent CH2 CH3 CH CH2 2 equivalent CH
1. What splitting pattern in the 1H nmr spectrum would you expect for the hydrogen atom(s)...
1. What splitting pattern in the 1H nmr spectrum would you expect for the hydrogen atom(s) colored red in the compounds shown below? Your choices are: s singlet d doublet t triplet quartet m multiplet. Enter the appropriate letter below each of the formulas. CH30-CH2-N(CH3)2 CH(CH3)2 -NO2 D (CH3)3c-O-CH2-CH3 E (CH3CH20)2CHCH3F
1. How many different sets of "chemically equivalent protons" are on each of these different compounds?...
1. How many different sets of "chemically equivalent
protons" are on each of these different compounds?
2. Give the splitting pattern for the designated
protons on the following molecules.
3 Which type of spectroscopy can most easily be used
to tell these two compounds apart? (Note superscripted number
denotes mass number of isotope of oxygen)
10. Identify which compound best matches the following
spectral data.
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QUESTIONS 1. NMR (2 Points) Draw the structure of acetaminophen and label chemically-equivalent hydrogen atoms with...
QUESTIONS 1. NMR (2 Points) Draw the structure of acetaminophen and label chemically-equivalent hydrogen atoms with the same lowercase letter. a. b. (2 Points) Find the peaks that represent these protons on the NMR spectrum of Tylenol, and write down the chemical shift of those peaks next to the protons you labeled nu differences in the peaks in the Excedrin and Tylenol
Acetaminophen, C8H9NO2 1. What is the HDI (Hydrogen Deficiency Index) for your compound? 2. How many...
Acetaminophen, C8H9NO2 1. What is the HDI (Hydrogen Deficiency Index) for your compound? 2. How many sets of non-equivalent protons are present in your compound? Please label all protons in your structure and indicate what would be the multiplicity of each set of non-equivalent protons in your compound (singlet, doublet, etc.)? 3. How many peaks would you predict would appear in the Carbon-13 NMR spectrum? Please label all carbons in your structure. 4. Which carbon atom in your compound would...
What results when a secondary alcohol is oxidized? a. a ketone d. an acid b. an...
What results when a secondary alcohol is oxidized? a. a ketone d. an acid b. an amine e. no reaction c. an aldehyde Which of the following combinations will react spontaneously? A. 12 + Cu2+ B. Pb2+ + Ag C. Zn2+ + Mg D. Sn2+ + Ni2+ The general formula for a cycloalkane can be represented by which of the following? a. C,H, C. CH b. C.H2n+2 d. C.H21-2 In a certain reaction AH =-136 kJ and E, = 96...
Question 1 The following reaction between 2-methylbut-2-ene and hydrogen bromide (HBr) is best described as what...
Question 1 The following reaction between 2-methylbut-2-ene and hydrogen bromide (HBr) is best described as what type of reaction? Refer to the Figure A) Addition B) Substitution C) Elimination D) Rearrangement Question 2 For the reaction in question 1, two products are possible- a major product, and a minor product. For the minor product, what is the splitting pattern for the added hydrogen (highlighted in red) that would be observed in the molecules HINMR spectrum? Refer to the Figure HBr...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
1. What splitting pattern in the 1H nmr spectrum would you expect for the hydrogen atom(s) colored red in the compounds shown below? Your choices are: s singlet d doublet t triplet quartet m multiplet. Enter the appropriate letter below each of the formulas. CH30-CH2-N(CH3)2 CH(CH3)2 -NO2 D (CH3)3c-O-CH2-CH3 E (CH3CH20)2CHCH3F
1. How many different sets of "chemically equivalent
protons" are on each of these different compounds?
2. Give the splitting pattern for the designated
protons on the following molecules.
3 Which type of spectroscopy can most easily be used
to tell these two compounds apart? (Note superscripted number
denotes mass number of isotope of oxygen)
10. Identify which compound best matches the following
spectral data.
1. How many different sets of "chemically equivalent protons" are on each of these different...
QUESTIONS 1. NMR (2 Points) Draw the structure of acetaminophen and label chemically-equivalent hydrogen atoms with the same lowercase letter. a. b. (2 Points) Find the peaks that represent these protons on the NMR spectrum of Tylenol, and write down the chemical shift of those peaks next to the protons you labeled nu differences in the peaks in the Excedrin and Tylenol
What results when a secondary alcohol is oxidized? a. a ketone d. an acid b. an amine e. no reaction c. an aldehyde Which of the following combinations will react spontaneously? A. 12 + Cu2+ B. Pb2+ + Ag C. Zn2+ + Mg D. Sn2+ + Ni2+ The general formula for a cycloalkane can be represented by which of the following? a. C,H, C. CH b. C.H2n+2 d. C.H21-2 In a certain reaction AH =-136 kJ and E, = 96...
Question 1 The following reaction between 2-methylbut-2-ene and hydrogen bromide (HBr) is best described as what type of reaction? Refer to the Figure A) Addition B) Substitution C) Elimination D) Rearrangement Question 2 For the reaction in question 1, two products are possible- a major product, and a minor product. For the minor product, what is the splitting pattern for the added hydrogen (highlighted in red) that would be observed in the molecules HINMR spectrum? Refer to the Figure HBr...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
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