Talk:Meldrum's acid

Error: Ketene Formation

There is a mistake in the diagram showing ketene formation from Meldrum's acid derivatives. The diagram shows that ketene formation occurs with the loss of CO2 and Acetate. In reality, it occurs with the loss of CO2 and acetone. 69.0.8.185 (talk) 03:06, 2 March 2011 (UTC)

I notified the creator of the diagram of the problem. If he does not fix it soon, the image should be removed. ChemNerd (talk) 14:01, 2 March 2011 (UTC)

Synthesis text and image do not match

The text and the image do not match. The text refers to acetic anhydride, but the image shows an acetic anhydride skeleton with two extra hydroxyl groups. Riventree (talk) 10:21, 24 June 2019 (UTC)

I assume you are talking about the text "malonic acid with acetone in acetic anhydride and sulfuric acid"? The second structure drawn is the malonic acid reactant. The acetic anhydride is the (CH₃CO)₂O" over the arrow (the reaction is "in" solvents, and it's common to put solvents and other non-"reactant" details at the arrow instead of drawn as prominently on the left. What I will fix though is to put the text reactant chemicals in the same order as they are drawn. DMacks (talk) 14:54, 24 June 2019 (UTC)

Excellent. I am glad the diagram is valid. — Preceding unsigned comment added by Riventree (talk • contribs) 17:38, 24 June 2019 (UTC)

@Riventree: you left a similar note on File talk:Meldrum-acid-original-synthesis.png. The image itself is on commons, so it shouldn't have an en.wp local talkpage at all. Would you like me to copy your comment to the commons talkpage (and respond there) so it can all be kept on the same site? Otherwise the local page might wind up getting deleted anyway if someone isn't careful reading the WP:SPEEDY criteria. DMacks (talk) 03:23, 25 June 2019 (UTC)

@DMacks:: Yes, please. I am not familiar with the machinations of wikimedia commons... I just wanted to throw a wide net. :)

Riventree (talk) 05:36, 25 June 2019 (UTC)

It's not a strong acid

according to the pK_a is 4.97. this means it's a weaker acid than e.g. acetic acid (like mentioned in ) — Preceding unsigned comment added by 131.130.27.191 (talk) 11:51, 6 August 2020 (UTC)

References

I adjusted the wording. The main idea is that it's unusually strong for its structure, not that it's a strong acid in the larger realm of acidic types of compounds. DMacks (talk) 15:20, 6 August 2020 (UTC)