Answer:
I think B is the answer so hope
The best way to predict the isomer of the given molecular information is to count the number of possible peaks present in spectra and compare it with the possible number of peaks given by each isomer. (Remember: This is not the final way to elucidate structure, but it is applicable in this question).
Explanation:
The number of peaks present in spectra are 8. Now, we will calculate the number of peaks given by each isomer.
ISOMER A: 1 peak for two equivalent methyl C attached to N
1 peak for carbonyl C
1 peak for methylene C
1 peak for methyl C
and 4 peaks for benzene C's as 2 carbons at ortho position and meta position to any of the two functional groups are equivalent hence give single signal.
So, 1+1+1+1+4 = 8
And it (Isomer A red) is the correct answer, because other two isomers give more than 8 peaks as they have no equivalent carbons in benzene ring.
<span>The alcohol is likely to be first deprotonated by the strong base, generating an alkoxide ion, which can then undergo intramolecular SN2 reaction to afford the observed product, a cyclic ether. Cl .. OH .. NaH H2 Cl .. + O : Na .. O NaCl
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Gamma decay hope this helps