I always hear about phosphorous in relationship to water pollution. Could somebody write about this substances role in water pollution and it's environmental impact?
I disagree with the formula. Phosphite ion should be PO33−. I do not buy the explanation that Phosphorous acid is a diprotic acid, since the hydrogen bonded directly to the central phosphorus atom is not ionizable because oxygen is much more electronegative than phosphorus, so it would make sense for all the hydrogens to bind to the oxygens.
I am a turfgrass manager dealing with many variety of organic and synthetic fertilizers. People are beginning to talk about the use of Phosphite materials vs Phosphate(or the usual Phosphorous in fertilizer N-P-K formulations.) Regular phosphate fertilizers come in the form of P2O5 while the new phosphite fertilizers are H3PO3. Can anyone help me in explaining what is the main distinction between the two compounds are. I am trying to understand the role of each as it affects the nutritional role and nutrient availability to plant cell health. Basicly why one is better or worse than the other?
Thanks
-- Hotlunch2000 ( talk) 20:14, 23 January 2008 (UTC)
The naming of phosphorus oxoanions (oxyanions historically) and acids is a mess. While we might not like it the ion is HPO32− not PO33-. I am not even sure if the PO33- ion is known. The more rational naming of IUPAC will probably never be adopted- so we just have to live with the confusing naming we have inherited from our predecessors. I guess the confusion is "compounded" by the naming of P(OR)3 as phosphites. -- Axiosaurus ( talk) 18:13, 23 November 2008 (UTC)
I've made a picture to show the structure of HPO32−. It's from a real crystal structure (ref given on image description page), so no-one can argue that H should be bonded to O. I've also made a 2D pic of the structure, showing two possible resonance forms. I'm not sure if either of these are any use in the article, but if they are, go ahead and insert them.
Ben ( talk) 14:00, 24 November 2008 (UTC)
I suggest examination of the formula for phosphite from an authoritative source, CAS Registry Number 14901-63-4. PO33−, according to the American Chemical Society.
Ppetrel
HPO32− is not phosphite. It is phosphonate. Please verify for yourself phosphonic acid HPO(OH)2 CAS Registry No. 13598-36-2, is the diprotic acid from which phosphonate, HPO32− derives. Ppetrel
—Preceding undated comment added 11:48, 8 February 2010 (UTC).
Pyrophosphite
http://news.yahoo.com/s/livescience/20100612/sc_livescience/newtheoryforlifesfirstenergysource —Preceding unsigned comment added by 75.85.14.106 ( talk) 23:48, 13 June 2010 (UTC)
Digging deeper into the articles, it appears they are talking about pyrophosphate, a well known molecule in intermediary metabolism. It is an inorganic analog of ATP. The title of the reference cited says pyrophosphite, but in the article itself the substance being talked about as life's first energy source is repeatedly called pyrophosphate, so I think the "ite" in the title is a misprint. CharlesHBennett ( talk) 18:20, 6 December 2010 (UTC)
I have introduced some cautions in the main phosphite article section on Plant Use, because I was unable to find the one cited source in my local library, and several of the statements appear ambiguous or dubious. Inorganic phosphATES are well known fertilizers, and organophoshATE esters are well known insecticides, but I was unable to find any online sources for phosphITES (inorganic or organic) as either fertilizers or fungicides. Could someone with more expertise or agricultural library access please help clarify this section? CharlesHBennett ( talk) 20:09, 6 December 2010 (UTC)
Did a little more research myself which seems to have clarified the situation, and revised the article appropriately. Inorganic phosphites are used as pesticides against oomycetes, and may have other beneficial effects, but they are converted to phosphate too slowly to serve as a plant's main phosphorus source. So it appears that advertising them as fertilizers was in part motivated by regulatory and public-relations considerations. CharlesHBennett ( talk) 22:39, 6 December 2010 (UTC)
I have removed some incorrect references- Loubs work was not about salts of PO33- ion but about salts containing HPO32- and H2PO3- so there is no evidence for the structure of the elusive PO33- ion. Greenwood does not mention this ion at all so I have removed the reference supporting the oxidation state of +3. Axiosaurus ( talk) 16:59, 19 December 2012 (UTC)
i have rewritten some of this to try to help resolve the confusion caused by the conflict between the IUPAC name phosphite, which is now being more widely used and the legacy use of the name which still continues particularly in agrichemicals field. I believe that UK A level refers to HPO32- as phosphite but I haven't got a reference for that. I have also added a brief comparison to arsenite and sulfite and a structure picture of HPO32- courtesy of Ben. The user box is mess. I cannot find a reliable CAS# for either the IUPAC phosphite or the legacy phosphite ions
Axiosaurus ( talk) 15:39, 21 December 2012 (UTC)
The image is one of the phosphite ester rather than the IUPAC phosphite PO33- (non existant) ion or the real HPO32- (IUPAC phosphonate) ion often called phosphite. Is the image appropriate. Axiosaurus ( talk) 07:56, 23 June 2014 (UTC)
"Salts containing
![]() | This ![]() It is of interest to the following WikiProjects: | ||||||||||
|
PO3−
3 cannot be isolated from aqueous solutions of phosphorous acid. Only salts containing H
2PO−
3 or HPO2−
3 are produced. There are reports of a salt Na3PO3 in older literature
[1] and the use of sodium metal to remove the third hydrogen in H3PO3 is mentioned in a textbook.
[2] However, if PO3−
3 is produced in aqueous solution or dissolved it would form H
2PO−
3 or HPO2−
3 immediately.
[2] Na3PO3 is referred to in many textbooks on Internet sources, often as part of an exercise in naming inorganic compounds, but also as a misprint of the formula for the
phosphate salt,
Na3PO4."
seemed like negative info, so I took it out. --
Smokefoot (
talk)
23:05, 6 July 2017 (UTC)