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Erich Clar page
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.
Tech News: 2026-22
Latest tech news from the Wikimedia technical community. Please tell other users about these changes. Not all changes will affect you. Translations are available.
Weekly highlight
- Following a successful account creation experiment, an improved logged-out edit warning message will be deployed to all Wikimedia wikis in the first week of June. The change will only affect logged-out users on mobile web who open an editing session. The updated experience is designed to encourage account creation more clearly, while still allowing users to edit with temporary accounts. Results from the experiment showed a significant increase in account creation, with a 27% relative lift among users shown the updated message. As expected, as more people funnel into account creation, temporary accounts decreased by a relative 16%. The experiment did not show any significant changes in constructive edit rates or other monitored contributor metrics. [1]
Updates for editors
- For security reasons, members of certain user groups are required to have two-factor authentication (2FA) enabled. Members of these groups will be unable to disable the last 2FA method on their account, and it will be impossible to add users without 2FA to these groups. Users will still be able to add new authentication methods or remove them, as long as at least one method is continuously enabled. In the next few weeks, users without 2FA will be removed from these groups. Notably, this applies to bureaucrats. See the linked tasks for deployment schedules. [2][3]
- WMDE Technical Wishes will run an A/B test on 10 wikis, testing potential improvements for Reference Previews. The experiment will run for ~2 weeks at the end of May / beginning of June and will affect 10% of desktop readers on the participating wikis.
- After two successful experiments, the Reader Growth team is rolling out an Image Browsing beta feature for all Wikipedias on mobile on May 25. This means that anyone who has all beta features on by default will start to see this feature, and others can check the box to turn it on in their preferences. The beta feature will include a carousel of all an article's images at the top of the article, with controls for editors to exclude images from the article's carousel or to exclude an article from the feature entirely.
View all 30 community-submitted tasks that were resolved last week. For example, three dimensional STL files were being rendered incorrectly by the media viewer 3D extension which is now fixed. [4]
Updates for technical contributors
- The legacy CSS classes
tleftandtrighthave been replaced withfloatleftandfloatrightas the former do not work consistently across all MediaWiki platforms, notably mobile web and mobile apps. Projects relying on these classes are encouraged to review related usage and plan for migration. Please note thatfloatleftandfloatrightmay also be deprecated in future, although there are currently no plans to do so. Read more.
Detailed code updates later this week: MediaWiki
Tech news prepared by Tech News writers and posted by bot • Contribute • Translate • Get help • Give feedback • Subscribe or unsubscribe.
MediaWiki message delivery 21:50, 25 May 2026 (UTC)
Disambiguation link notification for May 27
An automated process has detected that when you recently edited St. Anthony's High School (South Huntington, New York), a link pointing to the disambiguation page Sacred Heart High School was added.
(Opt-out instructions.) --DPL bot (talk) 21:51, 27 May 2026 (UTC)
Move a page
Hi! I'm here because I can't move a page from my user space to the main space. Could you please tell me what I should do, or would it be possible for you to move it for me? User:Harminon2/Doc (TV series 2026) Harminon2 (talk) 02:11, 29 May 2026 (UTC)
- Hi User:Harminon2. I do not know enough about the standards for TV series to recognize whether this meets the notability requirement and I cannot read Spanish to look at the refs to help me. It might be better to go through the usual "Article for Creation"/draft queue. Edit your article to place the following line at the very top:
- {{subst:AfC draft}}
- After you save that edit, your article should now have a box with instructions, ending with a blue "Submit the draft for review!" button. Clicking that will place your article in the queue where a reviewer who feels comfortable with this topic-area will handle it. DMacks (talk) 02:24, 29 May 2026 (UTC)
Advice on Black British People page
Hi, I'm quite new, so apologies for any mistakes I make in editing. I definitely didn't mean for my edit to be less than neutral. The recommended edits section lists some tasks as removing promotional material, which is why I put that for my edit, though I think "Tone Revision" would be more accurate in this case, and I should have done that or something else.
I would like to know your thoughts on the content of the edit, as I intended to make the text more aligned with the source which it references. The source material says "Nigerian pupils are achieving above the average for all Black African pupils, and above the average for all pupils" which I thought didn't match what was written, as from what I could tell, "Black Nigerian" pupils are only compared to "Black African (national figure)" and "All pupils (national figure)" and not to white pupils. That said, I do think that my edit could have been worded better, but I think that comparing to white pupils is making a conclusion not in the source.
Thanks for the help, I'm looking to improve my editing! Kay6067 (talk) 02:52, 1 June 2026 (UTC)
Administrators' newsletter – June 2026
News and updates for administrators from the past month (May 2026).

Bureaucrat changes
- Following an RfC, the "persistent usage of large language models" has been included as a common reason for a block.
- Mandatory 2FA for bureaucrats: Bureaucrats without two-factor authentication (2FA) enabled have already lost access to their advanced rights on 26 May. Those who do not enable 2FA may be automatically removed from the groups in mid-June 2026, and from that point onward, new members must have 2FA enabled before they can be added. (T423119, T423120)
- The arbitration case SchroCat has been closed.
- The arbitration case Michael Jackson has opened. Evidence submissions in this case closes on 1 June.
Miscellaneous
- Voting for the 2026 Universal Code of Conduct Coordinating Committee (U4C) election closes on 1 June.
Tech News: 2026-23
Latest tech news from the Wikimedia technical community. Please tell other users about these changes. Not all changes will affect you. Translations are available.
Updates for editors
- The Reader Experience team is conducting an experiment to show the reading lists feature, which is still in development, to logged-out mobile readers to test whether it encourages account creation at a higher rate compared to the watchstar button. The experiment was launched on May 18th on German, Spanish, Italian, Portuguese, Polish, Dutch, Turkish, and Urdu wikis, and it will run for a month.
- The Wikimedia Apps team released Phase 1 of the redesigned Home Feed to the Android Beta app. The new Home Feed includes a refreshed "Community" tab and a personalized "For You" tab featuring daily updated reading recommendations. The redesign is part of a broader effort to improve content discovery and create more engaging learning experiences in the Wikipedia apps.
View all 18 community-submitted tasks that were resolved last week. For example, an issue where images could fail to load for some suggested edits on Special:Homepage, leaving the thumbnail stuck in a loading state, has now been fixed. [5]
Updates for technical contributors
Detailed code updates later this week: MediaWiki
Tech news prepared by Tech News writers and posted by bot • Contribute • Translate • Get help • Give feedback • Subscribe or unsubscribe.
MediaWiki message delivery 21:06, 1 June 2026 (UTC)
Tech News: 2026-24
Latest tech news from the Wikimedia technical community. Please tell other users about these changes. Not all changes will affect you. Translations are available.
Weekly highlight
- Wikimedia Enterprise has increased the free usage limits for its API offerings. The monthly request limit for the On-demand API has increased from 5,000 to 50,000 requests, while the Snapshot API limit has increased from 15 to 30 requests per month. In addition, Structured Contents snapshots are now available for free accounts. These changes expand access to Wikimedia Enterprise data for developers, researchers, and organizations using Wikimedia content. [6]
Updates for editors
- The refreshed Explore Feed, now called the Home Feed, is rolling out to 50% of users of the Wikipedia Android app. The Home Feed helps readers discover relevant content through two new tabs: Community and For You. The Community tab provides a scrollable feed of curated content and updates from the broader Wikimedia community and movement, while the For You tab offers a full-screen, swipeable experience that shows content tailored to a user's interests. The redesign is part of a broader effort to improve discovery and enhance the learning experience in the Wikipedia app.
- The Which came first? daily trivia game is now available in the beta version of the Wikipedia iOS app in English, German, French, Portuguese, Russian, Spanish, Arabic, Chinese, and Turkish. The game uses historical events from Wikipedia's "On This Day" content and challenges readers to guess which of two events happened first. The game was previously released on Android. Communities interested in making the game available in their languages can read the instructions and requirements.
- Sub-referencing, a new MediaWiki feature that allows editors to reuse references with different details, will begin rolling out to Wikimedia wikis following a successful pilot phase. Deployment will start on 8 June for most Group 1 wikis and French Wikipedia, with additional Wikipedia language editions receiving the feature over the coming months. Communities are encouraged to prepare by checking for untranslated Cite extension messages in their language and reviewing any use of Reference Tooltips, which may require updates to support the new functionality. Wikis using Reference Previews do not need to take any action. Communities may also wish to create the cite-tracking-category-ref-details tracking category as a hidden category using
__HIDDENCAT__(or a dedicated template), and connect it to the corresponding Wikidata item d:Q129764848. [7] - The Page Previews experiment on mobile web has concluded. The team decided not to roll out the feature after the results showed no statistically significant impact on reader retention, as the primary success metric was retention improvement. Page Previews, which are already available on desktop and in the apps, display a thumbnail, lead paragraph, and link to the full article when readers tap a blue link. The experiment tested this experience on mobile web across six Wikipedias.
- The user interface icon library will be updated later this week or next week. Most of the ~300 icons have been slightly refined and ~30 new icons have been added. These changes improve the icons to make them more consistent and comprehensible, and provide more visual balance when they are used in groups.
- The Universal Language Selector (ULS) interface in MediaWiki, which helps users select content in other languages, has been updated. The new version improves speed and accessibility, and users of Wikimedia projects can now pin languages for quicker language switching. The deployment to Wikimedia sites will happen gradually in the coming weeks. You can test it now as a beta feature by selecting beta features in your profile preferences and share your feedback on the project page.
View all 21 community-submitted tasks that were resolved last week. For example, an issue where the Pageviews Analysis dashboard on pageviews.wmcloud.org stopped updating graph data in May 2026, affecting all users, has been fixed. [8]
Updates for technical contributors
- The function signature for
mw.util.addPortletLink()has been simplified. Developers can now pass a configuration object instead of a list of positional parameters when creating portlet links. The previous function signature remains supported for backwards compatibility. For example, instead of:mw.util.addPortletLink('p-cactions', '#', 'Stub', 'ca-stubtag', 'Add a stub tag to this page');usemw.util.addPortletLink('p-cactions', { href: '#', text: 'Stub', id: 'ca-stubtag', tooltip: 'Add a stub tag to this page' });. Script maintainers are encouraged to review existing uses ofaddPortletLink()and update them where appropriate. This change will be available on all wikis from 11 June. Thanks to community volunteer Gerges for contributing this improvement. [9] - Community Wishlist discussion: Product & Technology introduced changes meant to increase the number and complexity of wishes fulfilled, including the disbanding of the Community Tech team. They are engaging in discussions about a proposed direction for the wishlist from community members. Includes ways to structure annual voting, better tracking of wishes, removing focus areas, and staffing updates.
Detailed code updates later this week: MediaWiki
Tech news prepared by Tech News writers and posted by bot • Contribute • Translate • Get help • Give feedback • Subscribe or unsubscribe.