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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...
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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
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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
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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...
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1)
Nuclear magnetic resonance (NMR)
spectroscopy can be used to gather information about the structure
of a compound. The chemical shift of peaks in a 1H NMR or a 13C NMR
spectrum can be used to gather information about the types of
neighboring functional groups. The spin-spin splitting pattern in a
1H NMR spectrum can be used to determine the number of hydrogen
atoms on neighboring carbon atoms.
The chemical shift (?) of an atom is influenced by the
electrons...
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Part 2: Draw the NMR spectrum: Draw the structure of your molecule below, indicating each unique hydrogen atom with letters, starting with A. After complete the below table, summarizing the integration, approximate chemical shift, number of neighbors, and splitting pattern of each hydrogen in your given molecule. Note, you do not need to fill every row in the below table. By CH₃ Structures H₂C- 2 Brono- 4 methyl pertane Hydrogen Integration Letter A Chemical Number of Splitting Pattern Shift Neighbors...
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Which peak would NOT be in either the decoupled 13C or 1H NMR spectra of the molecule shown below? a)a singlet around 65 ppm (13C) b)a quartet around 2. 1 ppm (1M) c)a doublet around 1. 1 ppm (1H) d)a singlet around 170 ppm (13C) e) a singlet around 220 ppm (13C) f) a singlet around 3. 5 ppm (1H) 2) For which pair of molecules below would decoupled l3C NMR spectroscopy not be effective in easily telling apart?
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Proton (1H) NMR spectroscopy can provide which of the following pieces of information? (More than one choice may be correct.) Select one or more: a. The number of hydrogens that correspond to a given signal. b. The degree of unsaturation present in the molecule. O c. The number of unique hydrogens in the molecule. d. Information concerning the type of chemical environment for each hydrogen signal. e. How many hydrogens are on adjacent carbon atoms. f. The molar mass of...
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formula is C4H10O
1. Fill in the table below. (7 pts.) Peak letter Chemical shift Splitting pattern Integration # Type of H that made the peak (i.e CH) 2. Calculate the degree of unsaturation for your compound. (3 pts.) 3. Predict a structure for your unknown compound. (5 pts.) 4. Label the hydrogens in your structure with the letter of the NMR peak with which they correspond. (5pts.) 5. Explain how you arrived at your predicted structure. For example, "The...
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NMR Split Questions
Please Help!
Question 8 3 pts Recall, split is how a signal appears in the NMR. The split is determined by N+1, where N is the number of hydrogen NEXT to the signal hydrogen. For example, carbon Ais a CH3, it is next to carbon B which is a CH2. So the signal for carbon A will be a triplet (N+1;2+1 = 3, a triplet). The integration is what the signal consists of and the split is...