Propanoic acid and methyl ethanoate are constitutional isomers. (b) CH3 (c) CH2 OH propanoic acid Show how to distinguish between them by IR spectroscopy. (Use the Appendix.) (a) Which IR bands would one expect for propanoic acid? 1200-1250 cm 1375-1450 cm7 1450-1475 cm 1630-1820 cm 1200-1250 cm -1 -1 -1 -1 1375-1450 cm7 1450-1475 cm 1630-1820 cm 1200-1250 cm 1375-1450 cm Opropanoic acid Omethyl ethanoate -1 Which IR bands would one expect for methyl ethanoate? 1700-1725 cm -1 -1 1450-1475 cm7 1630-1820 cm CH3 methyl ethanoate 0000 1 1700-1725 cm 1735-1800 cm 2720 cm -1 2500-3300 cm 2720 cm -1 Which IR bands are unique to, i.e. not shared between, the two sets? CH3 -1 1735-1800 cm7 2500-3300 cm -1 -1 -1 1700-1725 cm -1 1 1735-1800 cm -1 2720 cm 2500-3300 cm -1 -1 1 (d) If the IR spectrum shows a band at 1465 cm-¹, which isomer is it?

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Propanoic acid and methyl ethanoate are constitutional isomers.
요
CH2 OH
(b)
(c)
оооо
Show how to distinguish between them by IR spectroscopy. (Use the Appendix.)
(a) Which IR bands would one expect for propanoic acid?
1700-1725 cm-¹
-1
1735-1800 cm
CH3.
оооо
propanoic acid
оооо
1200-1250 cm
-1
1375 1450 cm
1630-1820 cm
-1
1450-1475 cm
1200-1250 cm
-1
-1
-1
-1
1375 1450 cm
Which IR bands would one expect for methyl ethanoate?
1700-1725 cm
-1
1450-1475 cm
-1
1630-1820 cm
Which IR bands are unique
-1
1200-1250 cm
-1
1375 1450 cm
-1
1450-1475 cm7
0000
-1
1630-1820 cm
0000
CH3
methyl ethanoate
-1
0000
2720 cm
2500-3300 cm
-1
1735-1800 cm
2720 cm
-1
CH3
2500-3300 cm
-1
-1
2720 cm
to, i.e. not shared between, the two sets?
1700-1725 cm
-1
1735-1800 cm
-1
-1
2500-3300 cm
-1
-1
(d) If the IR spectrum shows a band at 1465 cm-¹, which isomer is it?
propanoic acid
Omethyl ethanoate
Transcribed Image Text:Propanoic acid and methyl ethanoate are constitutional isomers. 요 CH2 OH (b) (c) оооо Show how to distinguish between them by IR spectroscopy. (Use the Appendix.) (a) Which IR bands would one expect for propanoic acid? 1700-1725 cm-¹ -1 1735-1800 cm CH3. оооо propanoic acid оооо 1200-1250 cm -1 1375 1450 cm 1630-1820 cm -1 1450-1475 cm 1200-1250 cm -1 -1 -1 -1 1375 1450 cm Which IR bands would one expect for methyl ethanoate? 1700-1725 cm -1 1450-1475 cm -1 1630-1820 cm Which IR bands are unique -1 1200-1250 cm -1 1375 1450 cm -1 1450-1475 cm7 0000 -1 1630-1820 cm 0000 CH3 methyl ethanoate -1 0000 2720 cm 2500-3300 cm -1 1735-1800 cm 2720 cm -1 CH3 2500-3300 cm -1 -1 2720 cm to, i.e. not shared between, the two sets? 1700-1725 cm -1 1735-1800 cm -1 -1 2500-3300 cm -1 -1 (d) If the IR spectrum shows a band at 1465 cm-¹, which isomer is it? propanoic acid Omethyl ethanoate
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