Talk:Phosphorus tribromide

message: thumb|left|150 px|17498 bytes per Wikimedia Commons image file page
thumb|left|150 px|12183 bytes per Wikimedia Commons image file page
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Yes!  The PNG file definitely looks sharper!  You even straightened out my lone pair! (I hadn't noticed till then)  Did you use Photoshop, or IrfanView?  I didn't use PNG only because the file size was much bigger, and I notice that the new file is twice the size- if the sizes are the same is the quality the same?  When I scan my structures in, if I save it as PNG the file comes out 4x the size.  If I shrink it to the same size, then the quality (as far as I can tell) gets worse than the JPG of the same size.  I will have to look into getting something that will convert over without scanning, I think.  Cheers, Walkerma 21:44, 21 Apr 2005 (UTC)
replies: text: I used neither Photoshop nor IrfanView. I have neither one.  I just used the Microsoft Windows XP version of Paint which has actually become a fairly decent program compared to earlier versions of Paint in previous Microsoft Windows software.  For this PBr3, I took your :Image:Phosphorus tribromide.jpg file, copied it into a *.bmp file (from the big picture directly from the image page, not the smaller one in the Phosphorus tribromide article) using my AOL 9.0 software.  Then I "cleaned up" your pic using the "Paint" software and saved it into a *.PNG file.  The full sized pic is in :Image:Phosphorus tribromide.PNG and the pics aboved are thumbs of these reduced to 150 px on this Talk page.  I now show the file sizes in the captions.  The *.PNG file is 75% bigger than the *.jpg file.  I am still trying to further clean up the picture so I can further sharpen it a bit and reduce the file size.  In the meantime, I will soon insert my new  :Image:Phosphorus pentachloride.PNG pic into Phosphorus chlorides.  H Padleckas 13:06, 22 Apr 2005 (UTC)
replies: text: Another new cleaned-up version of the PBr3 pic was downloaded.  The full size version of the pic is a little sharper, but comparisons of the 150 px size pics don't show it.  The electrons were rounded and one of the P-Br bonds was moved slightly.  The file size was reduced by more than 5000 bytes (5 kB) from the previous *.PNG image file.  H Padleckas 17:52, 22 Apr 2005 (UTC)
thread_title:  Compare pics 

message: The article PBR3 has been merged into this one. It's edit history at the date of merging is as follows:
*02:50, 27 Apr 2005 User:SteveW m (wikified, stubbed)
*06:54, 22 Jan 2005 User:172.196.172.76 (added extra info)
*04:10, 19 Jan 2005 User:68.52.37.189 (Creating Page)
For copyright reasons, please do not delete this information. Physchim62 21:14, 22 May 2005 (UTC)
thread_title:  Merge 

message: This article has been removed from the GA list due to excessive amounts of jargon as well as a lack of citations. this article can also benefit from the addition of a section about the history of the chemical. If you feel that this review was in error feel free to take it to WP:GA/R. Tarret 20:58, 4 August 2007 (UTC)
thread_title: GA Delisted

message: The article describes, "it gives an explosive reaction that forms P2O5 and Br2". I have read that PBr3 is sometimes used as a flame retardant, what contradicts with this statement in the article. Indeed PBr3 would produce bromine radicals during this reaction, which can inhibit combustion - but this would be ineffective if the reaction which gives the bromine radicals is strongly exothermic, which means it increases temperature and combustion processes again.
So which statement is true now? Is PBr3 a flammable or a flame retardant? --79.243.253.194 (talk) 18:02, 26 October 2013 (UTC)
replies: text: Thanks for catching that glitch.  It cant be that bad because students and technicians have been using this reagent for decades.  The prep of PBr3 does not refer to explosive tendencies.  --Smokefoot (talk) 18:34, 26 October 2013 (UTC)
thread_title:  PBr3 reacts violently with oxygen