User talk:Dschanz

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Welcome to the Commons, Dschanz!
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Yann 17:24, 30 January 2007 (UTC)


The factual accuracy of the chemical structure File:Methyl jasmonate.png is disputed[edit]

Dispute notification The chemical structure File:Methyl jasmonate.png you uploaded has been tagged as disputed and is now listed in Category:Disputed chemical diagrams. Files in this category are deleted after one month if there is no upload of a corrected version and if there is no objection from the uploader or other users. Please discuss on the file talk page if you feel that the dispute is inappropriate. If you agree with the dispute, you can either upload a corrected version or simply allow the file to be deleted.

In all cases, please do not take the dispute personally. It is never intended as such. Thank you! --Ed (Edgar181) 12:19, 5 April 2011 (UTC)


You are correct: the structure file is obsolete and may be deleted. Methyl jasmonate has a Z configuration at the C=C double bond, and of course the stereoconfigurations are missing. Thanks for the notification, --Dschanz (talk) 20:04, 14 April 2011 (UTC)

File:Methyl_jasmonate.png[edit]

Commons-emblem-issue.svg File:Methyl_jasmonate.png has been listed at Commons:Deletion requests so that the community can discuss whether it should be kept or not. We would appreciate it if you could go to voice your opinion about this at its entry.

If you created this file, please note that the fact that it has been proposed for deletion does not necessarily mean that we do not value your kind contribution. It simply means that one person believes that there is some specific problem with it, such as a copyright issue.
Please remember to respond to and – if appropriate – contradict the arguments supporting deletion. Arguments which focus on the nominator will not affect the result of the nomination. Thank you!


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DMacks (talk) 08:59, 6 May 2011 (UTC)

a question for BKchem[edit]

Hi,I'm trying to draw chemical structure use BKchem.I found your work:http://zh.wikipedia.org/wiki/File:1,4-Dioxane_chair.svg.In your work,the back bond which is hide by font bond is break.But when I try to draw a similar structure,the back bond didn't break.Can you tell me how to do that?Thanks. 1,4-Dioxane chair.svg

Sorry it took me several weeks to answer your question, I just didn't visit Wikimedia Commons for some while.
With BKChem it is generally not possible to draw broken bonds within a single molecule, so I had to use a trick: the broken bonds are just two bonds each ending in a hidden carbon atom. By aligning the bonds carefully it will look as if it is one bond broken by another bond in the front. For example, the left rear carbon atom actually carries two hidden carbon atoms, one pointing down, and the other one pointing in direction of the right rear C atom of the dioxane. The hydrogen with the "broken" C-H bond pointing down from the left rear carbon atom is actually a separate methane molecule with a hidden carbon atom at the top and a visible H at the bottom end of the lower "part" of the bond.
It is somehow laborious but still manageable with small molecules. --Dschanz (talk) 13:45, 25 June 2011 (UTC)

File:Methyl_chloroformiate.svg[edit]

Commons-emblem-issue.svg File:Methyl_chloroformiate.svg has been listed at Commons:Deletion requests so that the community can discuss whether it should be kept or not. We would appreciate it if you could go to voice your opinion about this at its entry.

If you created this file, please note that the fact that it has been proposed for deletion does not necessarily mean that we do not value your kind contribution. It simply means that one person believes that there is some specific problem with it, such as a copyright issue.
Please remember to respond to and – if appropriate – contradict the arguments supporting deletion. Arguments which focus on the nominator will not affect the result of the nomination. Thank you!


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Leyo 17:44, 6 January 2012 (UTC)