how many signals would be present in the ¹hnmr?
how many signals would be present in the ¹hnmr?
Answer
Explanation:
Step1: Identify non - equivalent hydrogen environments
In the given molecule, the benzene ring has 3 non - equivalent sets of hydrogens (ortho, meta, para relative to the oxygen - containing substituent). The two methylene ($-CH_2-$) groups have different environments due to their different neighboring atoms. One is next to the oxygen of the ether linkage and the carbonyl, and the other is next to the carbonyl and the hydroxyl. The hydrogen on the hydroxyl group is also in a unique environment.
Step2: Count the environments
Counting all these non - equivalent hydrogen environments: 3 (from benzene) + 2 (from methylenes) + 1 (from hydroxyl) = 6.