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of water vapor in our atmosphere makes CFC's and even Co2 irrelevant. Who cares whether or not we affect it... if we do influence it is the cost really worth trying to fix what we can? That's just my opinion on the o-zone and global warming. Does it mean anything about the science of the article... not really... just food for thought to editors or whoever happens to read this.
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323:"CFCs' lack of reactivity gives them a lifespan which can exceed 100 years in some cases. This gives them time to diffuse into the upper stratosphere. Here, the sun's ultraviolet radiation is strong enough to break off the chlorine atom, which on its own is a highly reactive free radical. This catalyzes the break up of ozone into oxygen..."
847:
Several references appear at the end of the page, but few are actually referred to in the article. I've refrained from tagging anything as unreferenced; I'd prefer to either start a discussion about this or call it to the attention of someone who is bolder than I. The "Environmental issues" section
599:
If it's worse, just revert, but I changed the table so that the links are just in the first column. I made redirects for some of the systematic names that didn't have them. I left the red links that were already made in the first column, but I didn't make new ones for the entries that had other names
690:
I honestly think it's not even worth debating... I wish there was some way to include the fact that water vapor is not only a more influential greenhouse gas than any other gas but is by far the most abundant. Are CFC's really an influence on the O-zone and global warming? Maybe... but the sher mass
927:
The article isn't clear on the use of abbreviations of "Hydro fluoro compounds" / "Hydrofluorocarbons", sometimes the abbreviation is written HFCs, sometimes HFC (a third variant is HFC's, c.f. PFC (chemical)). I am no native speaker, but since the "C" stands for "compounds"/"carbons" shouldn't the
724:
It does not make any sense to me why is there only the
Initiation Step, but not the termination step. The free radical halogenation/substitution (whatever you call it), consist of Initiation, Propagation and Termination steps. If possible, please include the last step to make the reaction complete.
397:
really warrants an article of its own (2). The current article is very overlapping again, so I didn't include it in the merge (it doesn't add anything). Contrarily, I left it alone to make a stepping stone for someone bold enough to work on it to improve it to make your proposal (2). I (or somebody
900:
Has anyone data on the total amount (e.g. in tons) of CFC use commercially? I believe a statistic of "production in tons/year" over the relevant period and "estimated tons set free per year" would be an excellent addition to this article. If possible, of course with proper links to authentic data.
865:
Whilst haloalkanes are all alkanes, it is very important to remember that alkyl halides include all possible aliphatic and sundry organic molecule. For example 1-bromo-2-butyne is an alkyl halide despite being an alkyne. chloromethyl benzene for eg is also one. The CFC's etc sections are fantastic
529:
I came here looking for info on Freon and, apart from general CFC information, am given a grand total of one sentence, which is going to lead me on a long google trawl. Please split this article so that the sections can naturally accumulate information. Having redudant information is not a huge
435:
I have tried to avoid getting embroiled in this, but I feel I should weigh in with my comments. It was clearly necessary to remove a lot of duplication and perhaps the best way was to start with a merge. I agree with Henry, though, there should be several articles- and after the split someone
298:
This article is a merger of generic arcticles Alkyl halide, halocarbon, Freon, Halon, CFC, and HCFC. Several other general articles redirect to these four, e.g., HFC. This new merged article primarily tries to present the chemical compounds, and gives the environmental issues a fair touch. The
794:
One consequence of the merger has been that the word "halon" is used without being introduced or defined. As a non-chemist coming to this page to read about halon, it's a bit confusing. It sounds like a halon is some type of haloalkane. Or maybe it's a trade name? (It seems so, according to
375:
If one considers polyethylene, branched polyethylene, polypropylene, etc. to be alkanes, then partially or completely halogenated versions would fall under haloalkane. Perhaps, the existence of such halogenated polymers ought to be mentioned here, with whatever appropriate links there are.
371:
I think there was enough material for three decent articles. It was the "name coding" scheme that was largely redundant in those three articles. Eliminating the redundancies and appropriate links could have fixed that. However, I think I'm making this comment too late. I thought this was
675:
If somebody has the time & background, the environmental effects section should be updated to include climate change effects (radiative forcing, etc.) Perhaps it can go in the general halocarbons article. I'm not familiar enough with the chemistry/physics to put it together.
401:
The former halon article wasn't a chemical article at all, but a good article about fire extinguishing gas. Comparable as for the refrigerant application, I support the recommendation of the former halon talk page to copy the interesting data (and pictures) into the application
469:
over halocarbon, and I would prefer that too, as it is in more common use among chemists I know, at least for things with only one halogen like iodomethane (methyl iodide). In a "poll" of six recent editions of US college organic textbooks on my shelf, four called the chapter
679:
Yeah, I ran across articles that said some HFCs were horrendous greenhouse gases -- something like 17,000 times more effective in that regard than CO2. Not quite sure what to make of such comments, some clarification here from those with the know would be appreciated. MrG
386:
Actually, I quite agree with you, Henry: The reason for merging was that there were five totally overlapping articles, each covering mostly the same material. The recommendation for merging was listed on all article pages, and in my opinion rightly so.
372:
Cacycle's pet project and that he's been dormant for the past month and a half. There is also an article called refrigerant which also lists the "naming code" again. Maybe the information on haloalkanes can be incorporated into this article.
327:
Now we all know this, but how do the CFC's disperse into the atmosphere? Are they lighter than air? Can they gather enough energy to make it all the way into the upper stratosphere? I can't find the density of a CFC molecule anywhere on the web.
568:, namely 1,1,1,2-tetrafluoroethane, which is the new Freon replacement we've all come to know and love. ;-) I believe the Suva name would be consistent with that. If there's no response in a couple of days, I think I'll go and fix it myself.
582:
I made some changes to the haloalkanes table. My computer monitor screen is not very wide. IÂ made the table wider so that all the chemical formulas in the rightmost column could fit on one line. If you don't like some change, revert it.
880:
I am thinking about adding a little more information about how chlorofluorocarbons actually deplete the ozone layer. This addition should provide some background on why ozone depletion is happenning as well as the consequences of this
436:
should "police" them to make sure someone doesn't start adding Freon names to an unrelated page. I would avoid putting in a lot of stuff on CFCs & HFCs etc on the haloalkanes page, and keep it more like this
1019:
614:
Anyone know what the problem is with the unreadable characters? I'm on XP and tried IE and
Firefox with no joy. Is this an OCR or copy paste problem? What should those formulae be?? Regards
830:
By all the information I can gather it is the same as the HFC-134a in context but the pharmaceutical companies refer to it as HFA-134a (1,1,1,2-tetrafluoroethane). Is it a purity standard?
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Nice try, HoustonKid, but your Jedi mind tricks will not work on us ... water vapor in the atmosphere, at least when it collects into clouds, is a cooling factor on the Earth. MrG
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The merged article is this one, which needs a little more developing to become your (1). For obvious reasons, I redirected the original articles all into the merged article.
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And yes I did read all comments, including proposals, such as
Cacycle's, giving direction to the merge, and in my humble opinion (at least my intention) followed them.
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Additionally to the overall information in the haloalkane page, I think some more chemical pages could still reasonably be created (it is never to late), e.g., a
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about the halon compounds. Important is to make appropriate linking, avoiding future double (or worse contradictory) information in all of them.
659:(I'm not criticising anyone's merges/demerges as I don't have time to edit the article myself right now or even read all the comments above.)
513:, you'd have a reason not to use the systematic name perhaps. But I just don't happen to think of a compound that is really primarily called
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482:. I don't have strong feelings on this, however. Things like aryl halides and vinyl halides are always awkward to classify.
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article about haloalkanes on typing in 'CFCs,' and a bit like being redirected to a page on 'mammals' when typing in 'dog.'
866:
but perhaps a little misleading. The redirect from alkyl halide could be sent to organic halides. This would be better....
361:
combining Freons, CFC's, and HFC's discussing the refrigeration, air conditioning, and perhaps thermodynamic aspects, and
347:
I'm wondering if it was worth joining all these articles together into one article. If it was up to me, I would have had
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are not merged into this article. There is a lot still to do on it, but this is a start. Feel free to dig in.
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else bold enough) probably will be shifting some info from the merged articles to it, to make a start there.
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on
Knowledge. If you would like to participate, please visit the project page, where you can join
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This is an article on a class of organic chemicals, why is it part of the aformentioed project?
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Also noted is the shortage of peer-reviewed, scientific articles in the reference section.
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Is the use of hydrochlorofluorocarbons legal? Everywhere? I'm specifically wondering about
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Mind if you can tell us which characters are unreadable? The article turns out fine to me.
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I need to know if "2-Bromo-1-Chloropropane" is the same as "Dibromochloropropane".
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According to the "naming code", R-134 should be the most symmetrical version of C
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I made a slight edit on the second example to mkae it a more balanced equation.
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On page arrangment, it's overwhelming, and there are double redirects back to
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especially needs these direct references, as this part is commonly debated.
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section (correct text currently in there, and a better title perhaps?).
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Knowledge level-4 vital articles in
Physical sciences
96:, a collaborative effort to improve the coverage of
743:"Dibromochloropropane" or "2-Bromo-1-Chloropropane"
465:As for the name of this article, Cacycle preferred
876:An addition to the Chloro fluoro compounds section
645:page that it's not that environmentally friendly?
633:"Canned air" / arrangement of article / legality
211:and that biomedical information in any article
1010:Knowledge vital articles in Physical sciences
799:) It would be helpful to have a brief gloss.
797:http://en.wikipedia.org/Bromotrifluoromethane
209:Manual of Style for medicine-related articles
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1025:B-Class vital articles in Physical sciences
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972:Reaction Of haloalkane and silvercyanide?
299:specific chemical products, focussing on
417:for CFC, HCFC and HFC compounds, and a
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767:while dibromochloropropane will be C
759:2-bromo-1-chloropropane will be ClCH
201:This article is within the scope of
90:This article is within the scope of
530:problem. Having no information is.
218:Knowledge talk:WikiProject Medicine
49:It is of interest to the following
1060:Mid-importance toxicology articles
1035:High-importance Chemistry articles
652:. It's confusing to be taken to a
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1050:Low-importance medicine articles
1005:Knowledge level-4 vital articles
303:chemical compound each, such as
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110:Knowledge:WikiProject Chemistry
1070:All WikiProject Medicine pages
1065:Toxicology task force articles
1040:WikiProject Chemistry articles
1015:B-Class level-4 vital articles
591:Good changes! Please do more.
393:Then indeed information about
227:Knowledge:WikiProject Medicine
113:Template:WikiProject Chemistry
1:
986:14:10, 8 September 2016 (UTC)
605:08:19, 16 December 2005 (UTC)
269:This article is supported by
230:Template:WikiProject Medicine
104:and see a list of open tasks.
976:Why it produces iso-cyanide
967:15:01, 2 February 2010 (UTC)
784:19:50, 5 February 2007 (UTC)
754:18:22, 5 February 2007 (UTC)
578:Changes to Haloalkanes Table
343:Comment on union of articles
338:20:15, 16 October 2008 (UTC)
1055:B-Class toxicology articles
928:abbreviation be just HFC?
923:Question: HFC Abbreviations
871:04:15, 3 October 2007 (UTC)
738:17:53, 12 August 2006 (UTC)
628:17:44, 12 August 2006 (UTC)
480:alkyl halides (haloalkanes)
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891:06:54, 18 March 2008 (UTC)
838:09:30, 25 March 2007 (UTC)
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497:. Hence my preference for
440:in terms of content area.
311:20:26, 2005 May 29 (UTC).
253:project's importance scale
136:project's importance scale
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710:15:10, 11 June 2008 (UTC)
685:19:34, 12 June 2007 (UTC)
619:16:13, 9 April 2006 (UTC)
521:20:21, 2005 Jun 16 (UTC).
486:16:13, 16 Jun 2005 (UTC)
454:20:18, 2005 Jun 16 (UTC).
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428:19:54, 2005 May 31 (UTC).
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826:Where Does HFA-134a Fit?
779:Cl. So, not the same. --
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595:20:46, 2005 Jun 1 (UTC).
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573:11:09, 30 May 2005 (UTC)
404:fire extinguisher#Halons
381:10:58, 30 May 2005 (UTC)
364:(3) a third article on
357:(2) another article on
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503:carbon tetrachloride
204:WikiProject Medicine
507:ethylene dichloride
495:redirects are cheap
650:chlorofluorocarbon
491:IUPAC nomenclature
474:, one called them
415:chlorofluoroalkane
305:tetrachloromethane
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45:content assessment
953:Project Delaware?
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448:Good idea, Martin
419:bromofluoroalkane
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881:depletion--
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682:4.228.21.75
585:H Padleckas
570:H Padleckas
476:haloalkanes
378:H Padleckas
994:Categories
643:canned air
639:canned air
511:halon 1211
499:haloalkane
352:Haloalkane
164:Toxicology
978:Rajnish45
901:Cheers!
715:Synthesis
107:Chemistry
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39:is rated
932:unsigned
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294:Untitled
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959:Obikirk
807:Huttarl
532:Quirkie
251:on the
134:on the
41:B-class
868:Spgoo1
763:CHBrCH
602:Kjkolb
47:scale.
835:RonEJ
366:Halon
28:This
982:talk
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663:Njál
654:long
493:and
368:.
334:talk
126:High
509:or
301:one
243:Low
996::
984:)
965:)
942:)
915:)
889:)
833:--
817:)
813:•
775:Br
708:)
505:,
450:.
336:)
328:--
279:).
162::
980:(
961:(
938:(
911:(
885:(
821:.
809:(
777:2
773:5
771:H
769:3
765:3
761:3
704:(
566:4
564:F
562:2
560:H
558:2
554:4
552:F
550:2
548:H
546:2
332:(
255:.
221:.
138:.
53::
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