Commons:Deletion requests/File:5-Ethylidene-2-hydroxy-2,3-dimethylhexanedioic acid.svg
Incorrect absolute stereochemistry. Cited to a pubchem record that explicitly declines to declare either one, whereas https://www.chemspider.com/Chemical-Structure.4945092.html does assign both as R. File:Senecic acid.svg has them that way. DMacks (talk) 01:15, 12 August 2023 (UTC)
Actually, I now see that this is the second image at this filename. Previously, it had been correct. A few minutes after uploading, the same editor appears to have "flipped" the molecule graphically, not realizing that it's a 3D object so a 2D mirroring changed its meaning. So if anyone sees differential value to this other file reverted to the original, that's possible. But it also has a poorer representation of the stereochemistry (the methyl being plain-line rather than wedged, as in alt). DMacks (talk) 01:20, 12 August 2023 (UTC)
- Hi, I did this because when you look at the molcule of senecionine, then the acid i drawn like this with the retronecine connected right under with ester bindings. My idea is that it's easier to see the connection between the acid and the complete alkaloid. That's all.
- Like this:
- File:5-Ethylidene-2-hydroxy-2,3-dimethylhexanedioic acid.svg
- I my thougts are to do the same with other alkaloids too. But I see it's not welcome to do that here on Wikimedia Commons. But I see one error now, that I may correct.
- Sorry for my english! It's not my native language, and I suffer from dysleksia. Alf-Marius (talk) 11:38, 13 August 2023 (UTC)
- That is a great idea: having the structures positioned the same way so readers can see how they relate. But they way you flipped it created a different meaning not just a different orientation. Notice how the "OH" is on a wedged bond in the lower diagram, but a dotted bond in the upper diagram. DMacks (talk) 14:26, 13 August 2023 (UTC)
- I'd say to give the author a couple of days for correction of this structure. Without it I don't think that keeping the structure (reverted to the original version) is worth it. It's a rather non-standard representation (with some of the H atoms explicitly drawn) and it may be worth keeping given the arguments about the orientation. Wostr (talk) 12:48, 16 August 2023 (UTC)
- I uploaded File:Senecic acid2.png whose orientation matches its section in the full senecionine structure. No prejudice against someone making an SVG of it in the future, but want to get this DR moving forward. Also I see that the senecic acid section in the full senecionine structure is also incorrect: missing a methyl group. DMacks (talk) 18:54, 23 August 2023 (UTC)
- Alf-Marius, are you sure your second upload to File:Senecinic acid.svg is correct. SciFinder does not know what "senecinic acid" is, but instead finds "senecic acid" as closest match. And it has a methyl not an H. And googling for "Senecinic acid" only finds structures that seem to have the methyl. DMacks (talk) 19:06, 23 August 2023 (UTC)
- Hi, when I did draw this molecule, then it only had a german name. Witch I translated as best as I could. But when/if you rename the acid, bear notice it's the acid used in PAs like senecionine (esterified with retronecine) and senkirkine (esterified with otonecine). Alf-Marius (talk) 12:02, 25 August 2023 (UTC)
Delete, incorrect stereochemistry. Alfa-ketosav (talk) 09:17, 24 August 2023 (UTC)- Delete per discussion & no correction from the uploader. — Chem Sim 2001 (talk) 13:31, 24 August 2023 (UTC)
- Delete Please just delete it. Alf-Marius (talk) 19:39, 6 September 2023 (UTC)
Deleted: per nomination. --Christian Ferrer (talk) 10:27, 9 September 2023 (UTC)
