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Any article on radicals that does not list the common inorganic radicals and give their chemical formulas has a serious lacking. After all, the Wikipedia is supposed to be written for the General Reader, and not for chemists (and not for other experts in other fields).
Someone needs to explain something about these:
borates, carbonates, nitrates, nitrites, hydroxides, peroxides, phosphates, sulfites, sulfates, chlorites, chlorates, perchlorates, chromates, permanganates, bromates, and iodates.
98.67.99.85 (
talk)
01:11, 28 April 2012 (UTC)
"are atoms, molecules, or ions with unpaired electrons on an otherwise open shell configuration. These unpaired electrons" I would like to note that this phrase indicates that both the free electron, and the nucleus are both free radicles. this is inaccurate. -- Christopherlee247 ( talk) 15:55, 5 November 2009 (UTC)
excuse me there...I have an assignment about acid radicals and i tried to search for it on the wikipedia but all i could find was radicals as a whole...I'd be pleased if anyone could add some information about it...or even send me any article that explains exactly what are the acid radicals..thank you please contact : ramo005@hotmail.com —Preceding unsigned comment added by 196.205.193.125 ( talk) 13:54, 19 October 2007 (UTC)
I hope you take this to be constuctive and friendly criticism, but i found the article very hard to understand, perhaps others feel the same. Its obvious the author(s) of this article spent a great deal of time and effort to write the article. Could it be put more into "laymans" terms to help other appreciate the subject more?
Thanks and best wishes
I changed to to combaine what was on Radical (chemistry) and Free Radical and formated it. They should be merged, forwarding Free radical to here. Zwa 03:18, 24 Jun 2005 (UTC)
This page isn't particularly well organised/explained, insomuch as it talks about two different meanings of the word radical in chemistry. It would seem better to me to have a disambiguation page for this with a link to the exsisting Free radical page which is far more comprehensive, and another to a slightly expanded page explaining the use of the word in the sense of a substituent. -- ChemRad 23:53, 22 Feb 2005 (UTC) acid radicals are of two types.dilute and concentrated acid free radicals. —Preceding unsigned comment added by 59.103.90.123 ( talk) 23:31, 24 August 2009 (UTC)
== vote for merge wir species
I'm not a chemist, but I've never heard of an atomic or molecular species before. If there is such a thing in chemistry, it should be linked to definition. If not, then that's some bad word choice.
It is clear that you are not a chemist then. "atomic or molecular species" is a very commonly used term in chemistry.
I think it is untrue to suggest that radicals are uncharged. Radicals can be charged.
http://pubs.acs.org/cgi-bin/abstract.cgi/jpcbfk/2002/106/i40/abs/jp026591s.html
http://pubs.acs.org/cgi-bin/abstract.cgi/jpchax/1977/81/i17/f-pdf/f_j100532a018.pdf?sessid=6006l3
http://adsabs.harvard.edu/abs/2000SPIE.4061..154F
The "uncharged" has got to go. Superoxide is both an anion and a free radical, the charge is irrelevant. Jasoninkid
A large observational database of many different atmospheric constituents including radicals from a host of platforms is available. It is of general use. Do you think it should be added to the article text? Dlary
1st refference must be P78... great link btw. —Preceding unsigned comment added by 84.85.119.127 ( talk) 13:19, 11 January 2011 (UTC)
The section titled "Elimination of systemic free radicals" contains the sentence "Since reactive oxidative species (ROS) like sunlight and carcinogens lead to the formation of free radicals, inhibition of free radicals therefore decreases the risk of tumoric growth." Sunlight is certainly not a free radical and not all carcinogens are either. This sentence makes no logical sense and should be re-written by the author to better express their argument. 24.210.141.199 23:47, 10 March 2007 (UTC)
There are so many errors in this pare it should just be dieted. Jasoninkid
If memory serves Spin Traps are usually used in EPR experiments with free radicals should a part be written on them? Jasoninkid
Free radicals do not half to be created from a broken covalent bond, although they can, they can also be made by one e- reduction or oxidation of a atom or molecule, this line needs to be fixed. Jasoninkid
What is this obsession with no charge, "all species" should be most at most. Jasoninkid
They can also be created by a single electron being knocked out of an atom or molecule by high energy collisions (eg: cosmic rays). -- 128.243.220.22 ( talk) 16:41, 22 February 2008 (UTC)
O2 is not a radical. Jasoninkid
O2 is a radical, the MO diagram shows two unpaired electrons, hence O2 is paramagnetic. —Preceding
unsigned comment added by
196.207.35.245 (
talk)
11:41, 16 November 2007 (UTC)
Jasoninkid wrote many suggestion about what is radicals. I think there are two definition of radical. From the GLOSSARY OF TERMS USED IN PHYSICAL ORGANIC CHEMISTRY (IUPAC Recommendations 1994) [1] radicals are molecules which have unpaired electron. On the other hand, according to recent trend at some fierld of chemistry, definition of radical contains the any chemically unstable molecules such as singlet state of biradical, ion and so on. I added about this in the section of "Loose definition of radicals" this article. Please read and develop it.-- Jingxin 01:26, 19 April 2007 (UTC)
Free radical reaction needs to be created; free-radical reactions are a huge topic in chemistry; selectivity, homolysis and soforth is huge. 212.219.39.146 09:16, 24 April 2007 (UTC)
this is not to be a good article for radicals —Preceding unsigned comment added by 59.94.253.213 ( talk) 05:03, 2 September 2007 (UTC)
I have published several articles of original research in peer reviewed journals concerning oxygen free radicles.
These are not the same as side chain radicles attached to organic compounds.
This web page confuses the two, a criticism [see above] which is correct
There should be two separate sites. One dealing with organic side chains [radicles], the othe dealing with oxygen free radicles Historygypsy ( talk) 23:35, 5 August 2008 (UTC)
Have extensively edited the page for clarity, syntax, etc. without changing the sense. Bigbuck ( talk) 19:09, 15 February 2012 (UTC)
I'm a chemist yet not a specialist but i never heard of this term. A little search on the net didn't bring any answers, just copies of the sentence on Wikipedia. Can anyone please explain what verdazys is and if not, it's probably a hoax and should be removed. The real bicky ( talk) 10:09, 8 May 2012 (UTC)
I went back and checked, it was 107.2.199.74 that added this heading. The oxygen molecule is, in fact a diradical species, at least in its ground state, which is known as triplet oxygen. This means O2 is usually better represented as ·O-O·, rather than O=O. This triplet state is relatively unreactive, and O2 must be excited to the singlet state in order to take part in combustion. This is the reason, I believe why we aren't all on fire right now. - Tomásdearg92 ( talk) 22:51, 29 January 2013 (UTC)
The following sentence, temporarily removed from the head section, seems to confuse "radicals" with "ions":
Sure, a molecule can be a radical and also have nonzero charge; but the two concepts are independent, and ions like CO2−
3 or NH+
4 are not considered "radicals" (are they?)
Those two sentences are not quite wrong, but they will probably confuse the reader, especially if they are in the first paragraph of the article. --
Jorge Stolfi (
talk)
17:01, 29 January 2013 (UTC)
The head section gives only the strict definition of "radical" that requires "unpaired electrons in an open shell". By this definition I would think that free
methylene (carbene) :CH
2 in the singlet state is not a radical, but in the triplet state it is. However I have been told that free methylene cannot be called a "methylene radical" precisely because its ground state is the triplet. Which one is correct?
More generally, for the purpose of naming articles it seems we need a word meaning "has unsatisfied valence bonds", without regard for spin state. If "radical" is not OK, then what could we use?
The article mentions a "loose definition" of radical, namely "any chemically unstable molecule". But that definition is TOO lose, since it would include very unstable molecules like
ethylene dione that are never called "radicals". Is there a "loose but not too loose" school that would allow using "radical" for any molecule with unsatisifed valence bonds? --
Jorge Stolfi (
talk)
17:29, 29 January 2013 (UTC)
Would some expert please check this draft, my attempt to expand the head section to make it a bit more accessible to non-specialist readers? Is the informal description "dangling bonds" appropriate, or misleading? Are the examples correct? Thanks, -- Jorge Stolfi ( talk) 12:17, 30 January 2013 (UTC)
Free radicals are the enemy in many books, magazines and web sites about health. There's scant mention here of this idea, from whether it's a justified concern (presumably) to (if so) which free radicals and the whys, wheres and hows of dealing with them. There's much buzz about antioxidants in the diet, from vitamins to plant extracts, which help deal with free radicals. Could this be added to the article, even if it's only to point to other articles which deal with the topic more fully? 78.147.54.101 ( talk) 11:07, 8 August 2013 (UTC)
The result of the move request was: not moved. ErikHaugen ( talk | contribs) 23:39, 25 August 2015 (UTC)
Radical (chemistry) → Free radical – the opening sentence says "In chemistry, a radical (more precisely, a free radical)...", and according to the last paragraph of the lead:
So clearly the scope of the article is about "free" radicals, not just any radical. Or perhaps free radical is the same thing as a radical in modern parlance. But either way, "free radical" is a legitimate and precise name for this article. And I think it's preferable to the current name because (a) I believe "free radical" to be the WP:COMMONNAME for this, and (b) it satisfies WP:NATURAL because the "(chemistry)" disambiguator is no longer needed. Thanks — Amakuru ( talk) 08:06, 4 August 2015 (UTC) Relisted. Jenks24 ( talk) 06:48, 12 August 2015 (UTC)
The comment(s) below were originally left at Talk:Radical (chemistry)/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.
"Free radical" redirects here (intro bio topic) - tameeria 20:38, 5 May 2007 (UTC) |
Last edited at 20:38, 5 May 2007 (UTC). Substituted at 03:48, 30 April 2016 (UTC)
What is the correct dot for denoting radical? I see many uses of bullet but the online IUPAC Gold Book uses a super-scripted period, and apparently there are many more different dots. – says DD Tachibana 03:23, 19 May 2016 (UTC)
Please could an 'organic radical' be clarified? How is this different to a normal free radical? Thank you. KStar777 ( talk) 12:37, 15 June 2017 (UTC)
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9th class science 2409:4042:D98:4240:B61B:8956:3FF4:F943 ( talk) 15:27, 15 December 2021 (UTC)
Griller and Ingold's review (Acc. Chem. Res. 1976, 9, 1, 13–19) very clearly cautioned the use of stability in discussing the the reactivity of radicals. Particularly, there exists counter examples where the kinetic persistency is achieved at the cost of delocalization (i.e. thermodynamic stability). Equally, steric bulks does not always increase kinetic stability. Because of this I think much of the discussion on factors that governs stability needs to be further edited and clarified with examples and limitations. FlashNickel ( talk) 00:13, 22 June 2024 (UTC)