5-14) A compound A has a strong, broad IR absorption at 3200–3500 cm–1 and the proton NMR spectrum shown below. Treatment of compound A with H2SO4 gives compound B, which has the NMR spectrum shown at bottom and a molecular ion at m/z = 84 in its EI mass spectrum. Identify compounds A and B.
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5-14) A compound A has a strong, broad IR absorption at
3200–3500 cm–1 and the proton...
Compound A (C11H16O) has a band in the IR spectrum at 3450 cm-1 (strong, broad) and...
Compound A (C11H16O) has a band in the IR spectrum at 3450 cm-1 (strong, broad) and does not react with pyridinium chlorochromate (PCC) in CH2CI2. Compound A does react with HBr to give compound B (11H15Br). Compound B reacts with potassium f-butoxide to give compound C (C11H14). Ozonolysis of C followed by treatment with Zn and water gives CH3CHO and compound D (C9H10O). The proton NMR spectrum of compound D is given below. Treatment of compound D with ethyl magnesium...
Compound (C5H8O) has a strong IR absorption band at 1745 cm-1. The broad-band proton decoupled 13C...
Compound (C5H8O) has a strong IR absorption band at 1745 cm-1. The
broad-band proton decoupled 13C spectrum of this compound shows
three signals: at ?220 (C), 23 (CH2), and 38 (CH2). Propose a
structure for this compound.
Identify the compound A (C5H10O) with the proton NMR spectrum shown. Compound A has IR absorptions...
Identify the compound A (C5H10O) with the proton NMR spectrum shown. Compound A has IR absorptions at 3200�3600 cm�1 (strong, broad), 1676 cm�1 (weak), and 965 cm�1, and also has 13C NMR absorptions (attached protons in parentheses) at ? 17.5 (3), ? 23.3 (3), ? 68.8 (1), ? 125.5 (1), and ? 135.5 (1). Compound A may be resolved into enantiomers; draw one molecule of A, omitting wedge/dash bonds.
[20]. Which of the following compound is expected to show a strong absorption at 1720 cm1...
[20]. Which of the following compound is expected to show a strong absorption at 1720 cm1 in the IR spectrum [21]. Which of the following compounds gives only three peaks in the 1BC NMR spectrum (A) o-dimethylbenzene (B) m-dimethylbenzene (C) p-dimethylbenzene (E) 1,2,4-trimethylbenzene (D) 1,2,3-trimethylbenzene 122] H NMR coupling in the underlined proton is: CHs H3C-CH2-CH-OCH3 (A) d (B)t O,q (D)q (Bd,t
5) Provide a structure consistent with all of the data for the following compounds. Unless otherwise...
5) Provide a structure consistent with all of the data for the following compounds. Unless otherwise stated, the IR data is not all inclusive, i.e. you may propose a structure which would include peaks not specifically noted but your structure must account for the peaks which are listed or which are excluded. a) Compound Q (C6H100) decolorizes Br2/CC14. IR peaks at 3500 cm- and 1640 cm"! NO absorption between 1700 and 1800 cm? b) Compound K (C6H100) does not decolorize...
14. An unknown compound shows an intense IR absorption at 1710 cm- and gives the following...
14. An unknown compound shows an intense IR absorption at 1710 cm- and gives the following NMR spectrum: 8 1.1, doublet, 6Hs; 8 2.1, singlet, 3Hs; and 8 2.3-2.8, broad multiplet, 1H. Which structure is the compound? a) (CH3)2CHOCH3 с) CH:C-O)CH-CH-CH3 ect r b) CH3CH2CH2OCH3 d) (CH3)2CHC(O)CH3 15. This NMR spectrum corresponds to which compound? 2H 1H 1.7 ppm 1H O.5 1.5 1 2 2.5 3.5 4.5 4 5 бн (рpm) b) CH3CH2CH2CH2OH d) CH3CH2CH(OH)CH3 a) (CH3)3COH c) (CH)2СHCH,ОН 13
A compound C5H8O has a strong IR absorption at 1700 cm-1 and the NMR 1.4 doublet...
A compound C5H8O has a strong IR absorption at 1700 cm-1 and the NMR 1.4 doublet (3H), 1.6 multiplet (1H), 1.9 doublet (4H)
5. The IR spectra of the following compounds should a strong broad signal centered ar 3529...
5. The IR spectra of the following compounds should a
strong broad signal centered ar 3529 cm^-1. After a chemical
reaction was performed kn this compound the signal at 3520 had
disappeared and was replaced by a strong signal at 1720. which set
if reactants and products agreea with this experimental data?
6. A C^13 spectrum of an aromatic di-halide showed 4
carbon signals in the aromatic region of the spectra. Which of the
following structures is constant with this...
Match the following spectral descriptions with one of the compounds shown below. A compound is NOT...
Match the following spectral descriptions with one of the compounds shown below. A compound is NOT used more than once. [ Select] AC4HO2 compound has a strong IR absorption at 3300-3400 cm-1. The 1 H NMR spectrum has two singlets at 8 4.2 and 4.4 ppm: relative areas 4:2..The 13C spectrum shows 2 signals at 8 85 and 52 ppm. [ Select] AC7HO compound has a strong IR absorption at 1700 cm?, The H NMR spectrum has a singlet at...
An unknown compound A has an empirical formula of c3h6o and a molecular ion peak in...
An unknown compound A has an empirical formula of c3h6o and a
molecular ion peak in its mass spectrum at m/z 116. It also has no
IR absorption at 3200-3600cm^-1 but shows a peak at 1740cm^-1. The
H NMR spectra data of A is given below in table format. Use this
information to answer questions a-d below.
9 (15 Points). An unknown compound A has empiricl rmula of C,HO and a molecular ion peak in its mass spectrum at an...
Compound A (C11H16O) has a band in the IR spectrum at 3450 cm-1 (strong, broad) and does not react with pyridinium chlorochromate (PCC) in CH2CI2. Compound A does react with HBr to give compound B (11H15Br). Compound B reacts with potassium f-butoxide to give compound C (C11H14). Ozonolysis of C followed by treatment with Zn and water gives CH3CHO and compound D (C9H10O). The proton NMR spectrum of compound D is given below. Treatment of compound D with ethyl magnesium...
Compound (C5H8O) has a strong IR absorption band at 1745 cm-1. The
broad-band proton decoupled 13C spectrum of this compound shows
three signals: at ?220 (C), 23 (CH2), and 38 (CH2). Propose a
structure for this compound.
[20]. Which of the following compound is expected to show a strong absorption at 1720 cm1 in the IR spectrum [21]. Which of the following compounds gives only three peaks in the 1BC NMR spectrum (A) o-dimethylbenzene (B) m-dimethylbenzene (C) p-dimethylbenzene (E) 1,2,4-trimethylbenzene (D) 1,2,3-trimethylbenzene 122] H NMR coupling in the underlined proton is: CHs H3C-CH2-CH-OCH3 (A) d (B)t O,q (D)q (Bd,t
5) Provide a structure consistent with all of the data for the following compounds. Unless otherwise stated, the IR data is not all inclusive, i.e. you may propose a structure which would include peaks not specifically noted but your structure must account for the peaks which are listed or which are excluded. a) Compound Q (C6H100) decolorizes Br2/CC14. IR peaks at 3500 cm- and 1640 cm"! NO absorption between 1700 and 1800 cm? b) Compound K (C6H100) does not decolorize...
14. An unknown compound shows an intense IR absorption at 1710 cm- and gives the following NMR spectrum: 8 1.1, doublet, 6Hs; 8 2.1, singlet, 3Hs; and 8 2.3-2.8, broad multiplet, 1H. Which structure is the compound? a) (CH3)2CHOCH3 с) CH:C-O)CH-CH-CH3 ect r b) CH3CH2CH2OCH3 d) (CH3)2CHC(O)CH3 15. This NMR spectrum corresponds to which compound? 2H 1H 1.7 ppm 1H O.5 1.5 1 2 2.5 3.5 4.5 4 5 бн (рpm) b) CH3CH2CH2CH2OH d) CH3CH2CH(OH)CH3 a) (CH3)3COH c) (CH)2СHCH,ОН 13
5. The IR spectra of the following compounds should a
strong broad signal centered ar 3529 cm^-1. After a chemical
reaction was performed kn this compound the signal at 3520 had
disappeared and was replaced by a strong signal at 1720. which set
if reactants and products agreea with this experimental data?
6. A C^13 spectrum of an aromatic di-halide showed 4
carbon signals in the aromatic region of the spectra. Which of the
following structures is constant with this...
Match the following spectral descriptions with one of the compounds shown below. A compound is NOT used more than once. [ Select] AC4HO2 compound has a strong IR absorption at 3300-3400 cm-1. The 1 H NMR spectrum has two singlets at 8 4.2 and 4.4 ppm: relative areas 4:2..The 13C spectrum shows 2 signals at 8 85 and 52 ppm. [ Select] AC7HO compound has a strong IR absorption at 1700 cm?, The H NMR spectrum has a singlet at...
An unknown compound A has an empirical formula of c3h6o and a
molecular ion peak in its mass spectrum at m/z 116. It also has no
IR absorption at 3200-3600cm^-1 but shows a peak at 1740cm^-1. The
H NMR spectra data of A is given below in table format. Use this
information to answer questions a-d below.
9 (15 Points). An unknown compound A has empiricl rmula of C,HO and a molecular ion peak in its mass spectrum at an...
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