Talk:Sulfur trioxide

message: Looking at the discussion below, shouldn't the picture be changed to one that shows two single bonds and a double bond?
Theislikerice (talk) 14:14, 2 November 2012 (UTC)
thread_title:  Picture of Lewis Structure 

message: What is the bond structure of SO3?
:Not a simple question! The physical fact is that SO3 is trigonal planar with three equivalent sulfur–oxygen bonds. It is usual to describe these bond as double bonds, thus breaching the octet rule. For a more complete description of the theoretical controversy surrounding such breaches of the octet rule, see hypervalent molecule. I would add that IMHO sulfur–oxygen π-bonds have a relatively minor contribution to the overall bonding scheme. Physchim62 08:38, 24 May 2005 (UTC)
replies: text: I've never seen the 18 electron rule applied to main group compounds: it is widely breached for transition metal compounds in any case. And the sulfur in sulfur trioxide is in oxidation state +6... Physchim62 (talk) 14:03, 25 January 2006 (UTC)

text: @Xanthine: It's sp2 hybridization, hence the trigonal planar shape. --Spoon! 08:01, 31 August 2006 (UTC)
thread_title:  Bonding 

message: (Transferred from main article and edited for HTML. Physchim62 20:12, 16 September 2005 (UTC)
thread_title:  Nomenclature 

message: The link "Sigma Aldrich" does not guide me to a specific page about "Sulfur trioxide".
It seems, that this is a spam link.
That was not trying to be a spam link, the MSDS there is a good source of information but I am not sure that it is citable.  The main thing is that the NFPA health hazard is a 4 not a 3.  If you go to: 
http://www.sigmaaldrich.com/catalog/ProductDetail.do?lang=en&N4=425478|ALDRICH&N5=SEARCH_CONCAT_PNO|BRAND_KEY&F=SPEC
then download the MSDS, the NFPA rating can be seen.  ShreadedWheat (talk) 18:19, 2 August 2011 (UTC)
thread_title:  Sigma Aldrich 

message: Smokefoot has eliminated the conditions under which the mixed alpha-beta-gamma forms
arise. The section as it now stands begs the question of how to get the beta form. Karlhahn 19:15, 21 August 2006 (UTC)
replies: text: I will be re-revising this rapidly changing but important article.  I left a note on your Talk page.  --Smokefoot 22:26, 21 August 2006 (UTC)
thread_title: Structure of Solid

message: The text currently contains the sentence, "Only upon heating to ~340 °C does sulfuric acid revert to sulfur trioxide and water." This suggests
that you can separate H2SO4 into SO3 and water simply by heating it. In reality you end up with a mixture
of two gases (actually three gases because thermodynamics requires that some H2SO4 remain no matter how hot you get it) and like any gas mixture, it does not magically separate. So perhaps a qualifier to the sentence is in order -- something like, "although this is not a feasible means of separating H2SO4 into SO3 and water." Karlhahn 01:25, 22 August 2006 (UTC)
replies: text: Yeah, I wrote or re-re-revised the offending bit. You go ahead and edit away. You do it your way. The main problem is specifying the temperature, implying that magically the equilibrium jumps to 100% conversion. Nice catch.  --Smokefoot 01:39, 22 August 2006 (UTC)
thread_title: Reversion of H<sub>2</sub>SO<sub>4</sub> to SO<sub>3</sub> and Water

message: Is this page still classified as a stub
--Dinna89 12:10, 15 August 2006 (UTC)
replies: text: No, its long enough to be a "start", but still needs some cleanup. Physchim62 (talk) 17:06, 17 August 2006 (UTC)
thread_title:  Stub 

message: This image should be added to the information box, I just have no idea how to do it. (http://commons.wikimedia.org/wiki/Image:Sulfur-trioxide-3D-vdW.png)  —Preceding unsigned comment added by 66.130.16.181 (talk) 22:25, 29 November 2007 (UTC)
thread_title:  3-D Bonding Structure 

message: I'm concerned about several things in the infobox.  The density of the gas would be nice in there as its melting point is above room temperature.  (The vapor is 2.76 time denser than air see the MSDS in link in the SigmaAldrich section.)  
Where it says hydrolyzes to form sulfuric acid, where it actually takes up a water molecule to form sulfuric acid.  Hydration would be more appropriate.  
ShreadedWheat (talk) 18:43, 2 August 2011 (UTC)
thread_title:  Infobox 

message: Hello fellow Wikipedians,
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thread_title:  External links modified 

message: At the top of the Sulfur trioxide properties table, there is an image of the SO3 molecule shown with three double bonds, implicating a bond order of 2. But suddenly, in the "Molecular structure and bonding" section, it says that the Lewis structure consists of an S=O double bond and two S–O dative bonds, implicating a bond order of 1.3333333333... The two structures contradict to each other. Or... are they? Why not two S=O double bonds and one S–O dative bond? Bernardirfan (talk) 18:13, 6 July 2020 (UTC)
replies: text: I think that this is now addressed. KeeYou Flib (talk) 22:55, 11 February 2022 (UTC)
thread_title:  Contradictory/confusing information about the structure of the SO<sub>3</sub> molecule 

message: A discussion is taking place to address the redirect :Sulfan. The discussion will occur at Wikipedia:Redirects for discussion/Log/2021 July 19#Sulfan until a consensus is reached, and readers of this page are welcome to contribute to the discussion.  Leyo 08:06, 19 July 2021 (UTC)
thread_title:  "Sulfan" listed at [[Wikipedia:Redirects for discussion|Redirects for discussion]]