Homework Answers
A. C7H10
B. C6H6O
C. C5H2O2
D. C4H16ON
All have molar mass:94 with different molecular formula
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Consider a mass spec with a spectral mass of 94. a) What formula would you proposed...
Consider a mass spec with a spectral mass of 94 What formula would you proposed if...
Consider a mass spec with a spectral mass of 94 What formula would you proposed if the hydrocarbon chemical only had carbons and hydrogens? What formula would you proposed if the hydrocarbon also had one oxygen? What formula would you proposed if the hydrocarbon also had two oxygen? What formula would you proposed if the hydrocarbon had one oxygen and one nitrogen?
For all spectral analysis, show your complete analysis and provide evidence for your proposed structure. Basic...
For all spectral analysis, show your complete analysis and provide evidence for your proposed structure. Basic Spectroscopy i. Determine the index of hydrogen deficiency for the following a) C3H7NO b) C4H4BrNO2 c) C21H22N202 ii. Calculate the molecular formulas for possible compounds with molecular masses of 136, using the Rule of Thirteen. You may assume that the only other atoms present in each molecule are carbons and hydrogens. a) A compound with two oxygen atoms b) A compound with two nitrogen...
7. Which compound below best fits the following spectral data? 8. How many signals would you...
7. Which compound below best fits the following
spectral data?
8. How many signals would you expect to see in the
broadband decoupled C^13 spectra of the following compounds?
9. If a proton gave an NMR signal at 3.2 ppm on a MHz
NMR, what would the chemical shift be of this proton (in ppm) if
the sample was run in 400 MHz NMR?
7. Which compound below best fits the following spectral data? (6 points) H-1 NMR 0.9 ppm...
Please intereperet all spectra fully. Solid U IR Mass Spec. Mt 100- 80 60- 40 0...
Please intereperet all spectra fully.
Solid U IR Mass Spec. Mt 100- 80 60- 40 0 50 75 100 150 175 m/z Solid U H-NMR doublet, 2H doublet, 2H broad singlet, 1H PPM "C-NMR PPM Solid Unknown Information: Unknown #: Melting Point Infrared Analysis: Explain below how the infrared spectrum led you to select the functional group present in your unknown. Remember, your unknown must belong to one of the following functional groups: alcohol, aldehyde, amine, carboxylic acid, ketone, or...
7. Which compound below be H-1 NMR 0.9 ppm (quartet fits the following spectral data? (6...
7. Which compound below be H-1 NMR 0.9 ppm (quartet fits the following spectral data? (6 points) 1.2 ppm (sextet 2 hydrogens), 2.1 ppm (triplet, hydrogens), 4.3 ppm (singlet 3 hydrogens) C-13 NMR 5 signals 25 ppr ppm (CH2); 61 ppm: (CH3) 198 Ppm (C). IR strong peak 1735 cm Ignals 25 ppm (CH): 35 ppm (CH2), 46 ppm (CH2); 61 ppm: em Mass Spee parent M+ = 102 Mass Spec paren ou 0 H2 CH3 HjC Holo H3C- CC...
Unknown Number: Molecular Formula: Index of Hydrogen Deficiency: Structure: Mass Spec Molecular Weight: Important Fragments; what...
Unknown Number:
Molecular Formula:
Index of Hydrogen Deficiency:
Structure:
Mass Spec
Molecular Weight:
Important Fragments; what are they and what do they mean? (base
peak structure, is there a halogen, is there a benzene ring, is
there an odd number of nitrogens, other important fragments that
tell something about the structure)
IR
Is there an OH? Wavenumber?
Is there a carbonyl group? If so what type (acid. ester, amide,
aldehyde, ketone etc.)? Wave number?
Other important peaks (terminal alkyne, cyano...
Help with all parts. Thanks! Choose any molecular formula you would like (such as C_6H_8O_1) and...
Help with all parts. Thanks!
Choose any molecular formula you would like (such as C_6H_8O_1) and use this ONE selected molecular formula to construct the following molecules: A) A compound with two adjacent sp^2 hybridized carbons. B) A different compound with two adjacent sp^2 hybridized carbons that has stereochemistry. C) A stereoisomer of the compound you drew for Q1B. D) A constitutional Isomer for the compound you drew in Q1B. E) Assign the stereochemistry of all of your stereoisomers (E...
()UESTIONS 1. If you had used a different mass of magnesium metal, would you expect the...
()UESTIONS 1. If you had used a different mass of magnesium metal, would you expect the empirical formula of the compound to be the same? Explain. 2. If you had omitted steps 12 and 13 from the experiment, how would this omission have affected your results in terms of the empirical formula of the magnesium oxide? In other words, would the ratio of the magnesium to the oxygen have been greater or less than the obtained ratio? 3. From the...
5) 4. Calculate the specific rotation for a substance that is at a conc. of 0.02...
5) 4. Calculate the specific rotation for a substance that is at a conc. of 0.02 /ml, and in a 2 decimeter tube gives an observed rotation of +12° 15) 5. For this molecule: a. How many chemically different hydrogens? b. How many chemically different carbons? C. What would be the mass of the molecular ion in El-MS? 10) 6. True or False: a. Chemical shifts, in ppm, are independent of the magnetic field strength. T F b. In HNMR,...
5) 4. Calculate the specific rotation for a substance that is at a conc. of 0.02...
5) 4. Calculate the specific rotation for a substance that is at a conc. of 0.02 /ml, and in a 2 decimeter tube gives an observed rotation of +12° 15) 5. For this molecule: a. How many chemically different hydrogens? b. How many chemically different carbons? C. What would be the mass of the molecular ion in El-MS? 10) 6. True or False: a. Chemical shifts, in ppm, are independent of the magnetic field strength. T F b. In HNMR,...
For all spectral analysis, show your complete analysis and provide evidence for your proposed structure. Basic Spectroscopy i. Determine the index of hydrogen deficiency for the following a) C3H7NO b) C4H4BrNO2 c) C21H22N202 ii. Calculate the molecular formulas for possible compounds with molecular masses of 136, using the Rule of Thirteen. You may assume that the only other atoms present in each molecule are carbons and hydrogens. a) A compound with two oxygen atoms b) A compound with two nitrogen...
7. Which compound below best fits the following
spectral data?
8. How many signals would you expect to see in the
broadband decoupled C^13 spectra of the following compounds?
9. If a proton gave an NMR signal at 3.2 ppm on a MHz
NMR, what would the chemical shift be of this proton (in ppm) if
the sample was run in 400 MHz NMR?
7. Which compound below best fits the following spectral data? (6 points) H-1 NMR 0.9 ppm...
Please intereperet all spectra fully.
Solid U IR Mass Spec. Mt 100- 80 60- 40 0 50 75 100 150 175 m/z Solid U H-NMR doublet, 2H doublet, 2H broad singlet, 1H PPM "C-NMR PPM Solid Unknown Information: Unknown #: Melting Point Infrared Analysis: Explain below how the infrared spectrum led you to select the functional group present in your unknown. Remember, your unknown must belong to one of the following functional groups: alcohol, aldehyde, amine, carboxylic acid, ketone, or...
7. Which compound below be H-1 NMR 0.9 ppm (quartet fits the following spectral data? (6 points) 1.2 ppm (sextet 2 hydrogens), 2.1 ppm (triplet, hydrogens), 4.3 ppm (singlet 3 hydrogens) C-13 NMR 5 signals 25 ppr ppm (CH2); 61 ppm: (CH3) 198 Ppm (C). IR strong peak 1735 cm Ignals 25 ppm (CH): 35 ppm (CH2), 46 ppm (CH2); 61 ppm: em Mass Spee parent M+ = 102 Mass Spec paren ou 0 H2 CH3 HjC Holo H3C- CC...
Unknown Number:
Molecular Formula:
Index of Hydrogen Deficiency:
Structure:
Mass Spec
Molecular Weight:
Important Fragments; what are they and what do they mean? (base
peak structure, is there a halogen, is there a benzene ring, is
there an odd number of nitrogens, other important fragments that
tell something about the structure)
IR
Is there an OH? Wavenumber?
Is there a carbonyl group? If so what type (acid. ester, amide,
aldehyde, ketone etc.)? Wave number?
Other important peaks (terminal alkyne, cyano...
Help with all parts. Thanks!
Choose any molecular formula you would like (such as C_6H_8O_1) and use this ONE selected molecular formula to construct the following molecules: A) A compound with two adjacent sp^2 hybridized carbons. B) A different compound with two adjacent sp^2 hybridized carbons that has stereochemistry. C) A stereoisomer of the compound you drew for Q1B. D) A constitutional Isomer for the compound you drew in Q1B. E) Assign the stereochemistry of all of your stereoisomers (E...
()UESTIONS 1. If you had used a different mass of magnesium metal, would you expect the empirical formula of the compound to be the same? Explain. 2. If you had omitted steps 12 and 13 from the experiment, how would this omission have affected your results in terms of the empirical formula of the magnesium oxide? In other words, would the ratio of the magnesium to the oxygen have been greater or less than the obtained ratio? 3. From the...
5) 4. Calculate the specific rotation for a substance that is at a conc. of 0.02 /ml, and in a 2 decimeter tube gives an observed rotation of +12° 15) 5. For this molecule: a. How many chemically different hydrogens? b. How many chemically different carbons? C. What would be the mass of the molecular ion in El-MS? 10) 6. True or False: a. Chemical shifts, in ppm, are independent of the magnetic field strength. T F b. In HNMR,...
5) 4. Calculate the specific rotation for a substance that is at a conc. of 0.02 /ml, and in a 2 decimeter tube gives an observed rotation of +12° 15) 5. For this molecule: a. How many chemically different hydrogens? b. How many chemically different carbons? C. What would be the mass of the molecular ion in El-MS? 10) 6. True or False: a. Chemical shifts, in ppm, are independent of the magnetic field strength. T F b. In HNMR,...
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