Comparison of acids Organic Chemistry

AI Thread Summary
The discussion revolves around comparing two acid structures in organic chemistry, specifically questioning why the second structure is the correct answer for a given problem. The first structure is compared to CH3CO2-, while the second structure is noted to be listed in Table 3.1, eliminating the need for further comparison. Participants express uncertainty about determining which acid is stronger based on the provided information, suggesting that the differences are too minimal to make a definitive judgment. The conversation highlights the complexity of acid strength comparison in organic chemistry. Ultimately, the conclusion is that the information provided does not allow for a clear determination of acid strength.
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Please look at pictures.
I am wondering for (d). Why is the answer the second one? To which structure in Table 3.1 should I compare it to? I compare the first one to CH3CO2-. What about the second one?
 

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Second one is in the table, no need to look for analogous structure.

That being said, I would not judge which is stronger using the information given. Too close.
 
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