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Erich Clar page

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I want to include a synthetic reaction that is known as Clar's reaction. It is of a certain class of cyclic ketones that condense with themselves when heated to 400 C in a mixture of zinc dust and zinc chloride.

I will add references and a description of what it is used for in synthesizing new polycyclic aromatic hydrocarbons.

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An automated process has detected that when you recently edited Trimethylsilyl acetate, a link pointing to the disambiguation page Alcohol was added.

(Opt-out instructions.) --DPL bot (talk) 07:54, 18 February 2026 (UTC)[reply]

Tech News: 2026-09

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MediaWiki message delivery 19:01, 23 February 2026 (UTC)[reply]

Administrators' newsletter – March 2026

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News and updates for administrators from the past month (February 2026).

Administrator changes

removed

CheckUser changes

removed Ks0stm

Oversight changes

removed Ks0stm

Guideline and policy news

Arbitration

  • Following a motion, remedy 9.1 of the Conduct in deletion-related editing case has been amended to limit TenPoundHammer to one XfD nomination or PROD per 24-hour period.
  • Following a motion, the Iskandar323 further POV pushing motion has been rescinded.
  • The Arbitration Committee has passed a housekeeping motion rescinding a number of outdated remedies and enforcement provisions across multiple legacy cases. In most instances, existing sanctions remain in force and continue to be appealable through the usual processes, while some case-specific remedies were amended or clarified.

Miscellaneous


pyrimidine dimer: move & categories

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Dear DMacks,

I made recently an important modification in the article “Pyrimidine dimer”. I added sections on “photochemistry”, “optical properties”, “technological applications” and modified the introduction accordingly. I also wanted to slightly modify the title to “Pyrimidine dimers” because there are many different classes of such dimers, corresponding to at least 40 different chemical compounds. But when tried “move” I saw that I was not allowed to proceed to this modification. Moreover, I tried to change the categories to , , , , and . But it seems that in this article there are hidden categories and I failed to do the change. I would greatly appreciate if you could help me with these two issues. Thank you in advance Sincerely, Serbacc (talk) 09:00, 2 March 2026 (UTC)[reply]

pyrimidine dimer:categories

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Dear DMacks, As the "categories disappeared in my previous message, I send them again: Nucleic acids, Photochemistry, Mutation, Melanoma, Smart materials. Thank you Serbacc (talk) 17:38, 2 March 2026 (UTC)[reply]

Tech News: 2026-10

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MediaWiki message delivery 17:49, 2 March 2026 (UTC)[reply]

Healthcare in Netherlands

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Thanks for reverting that addition - moments before I hit the submit button on my reversion, lol. I also suggested WP:AITELLS in my edit summary. Have reverted several of their other contributions. Brand-new editor with picture perfect additions that take liberties with the provided sources. Sigh. cheers. anastrophe, an editor he is. 19:05, 4 March 2026 (UTC)[reply]

Yeah. The asymmetry of effort is one of the most annoying aspects. DMacks (talk) 22:13, 4 March 2026 (UTC)[reply]