Talk:Alkane
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Alkane is a former good article candidate. There are suggestions below for which areas need improvement to satisfy the good article criteria. Once the objections are addressed, the article can be renominated as a good article. If you disagree with the objections, you can seek a review.
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I think there should be a mention to the way the different alkanes are related to common fuels, and their physical properties. Methane is a gas at normal condition, and very difficult to liquify, (methane + ethane = natural gas? not sure), butane and propane are also gases, but they can be liquified rather easily, and so they are sold in cilinders, in liquid form. Those cilinders are easily recharged. pentane and hexane, i'm not sure, but heptane and octane are liquid in normal conditions, are main constituents of gasoline. Somewhere in the tens of carbons, the alkanes are solid in normal conditions (paraffine)....etc..
Alkanes differ only slightly from fats and oils. Some discussion of this, would be useful.
Does methylpropane count as propane? The way the article's worded suggests that it is simply an isomer of propane, which is definitely isn't! -- Steinsky
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[edit] standardization of chemical articles
I think there should be a standardized form of all chemical articles. It should include a chart with physical properties somewhere, and the same article sections. It would be a tough job to do, considering the vast number of chemicals in the database.
--Edsanville 20:56, 2 Jun 2004 (UTC)
- There is one, at WikiProject Chemistry, however, a template for organic compounds has yet to be established. Gentgeen 21:04, 2 Jun 2004 (UTC)
[edit] Smallest alkane that does not exist
What is the smallest integer Z where CZH2Z+2 does not exist?? 66.245.80.45 16:48, 18 Sep 2004 (UTC)
- He he this looks like a homework question. Okay, you still need to figure it out yourself, so I'm just helping with the arithmetics:
z CzH2z+2 Structure Does it exist? -------------------------------------------------------------- ... 3 C3H8 H3C-CH2-CH3 2 C2H6 H3C-CH3 1 CH4 CH4 0 H2 H2 -1 C-1 ? ...
- --Unconcerned 04:23, 24 Sep 2004 (UTC)
H2 is not considered an alkane because it has no carbon!
[edit] Suggest 5 possible wiki links and 2 possible backlinks for Alkane.
An automated Wikipedia link suggester has some possible wiki link suggestions for the Alkane article:
- Can link Melting point: ... * The density of an alkane is less than water density. * Melting point and boiling point increase with molecular weight and with l... (link to section)
- Can link boiling point: ...an alkane is less than water density. * Melting point and boiling point increase with molecular weight and with length of the main ... (link to section)
- Can link molecular weight: ... density. * Melting point and boiling point increase with molecular weight and with length of the main carbon chain.... (link to section)
- Can link carbon chain: ... increase with molecular weight and with length of the main carbon chain.... (link to section)
- Can link hydrogen atom: ...lysed with [[UV]]. '''2.''' Initiation step (slow step): a hydrogen atom is pulled off from methane... (link to section)
Additionally, there are some other articles which may be able to linked to this one (also known as "backlinks"):
- In Chloroform, can backlink aliphatic hydrocarbon: ...ause vomiting. [[Trichloroethylene]], a related halogenated aliphatic hydrocarbon, later supplanted chloroform as a safer alternative, though...
- In Water contact, can backlink saturated hydrocarbon: ...he pores, which creates a transition zone between the fully saturated hydrocarbon levels and the fully saturated water levels.
Notes: The article text has not been changed in any way; Some of these suggestions may be wrong, some may be right.
Feedback: I like it, I hate it, Please don't link to — LinkBot 11:29, 1 Dec 2004 (UTC)
[edit] Cracking and Reforming
This section doesn't mention reforming at all, only cracking. --82.43.150.220 19:38, 15 May 2006 (UTC)
[edit] Good article nomination failed
- WP:LEAD too short.
- The names of all alkanes end with -ane. ... why? Talk about the history or where the nomenclature comes from.
- Trivial names ... again why are these name kept or why do these compound have multiple names.
- Images imbedded in text isn't recommended, plus they need to have captions.
- Too many lists, at least in the beginning.
- References missing. Use the Cite.php method if possible because it is recommended.
- The line, Alkanes occur both on Earth and in the solar system, however only the first hundred or so, and even then mostly only in traces., doesn't make any sense ... first hundred of what, alkanes, branched alkanes or unbranched alkanes.
- methane and ethane are every day gases, at least methane is emitted by animals through their feces. That is much more relevant than knowing it is present on such comet that is not known to the general public.
- On Titan, the satellite of Saturn, it is believed that there were once large oceans of these and longer chain alkanes: smaller seas of liquid ethane are thought still to exist there. - This is trivia or it pertains tu such articles as Titan or ethane.
- ... produced primarily by forms of Archaea. - maybe should say ... produced primarily by organisms such as Archaea.
- Although they cannot be commercially exploited at the present time, the calorific value of the known methane hydrate fields exceeds the energy content of all the natural gas and oil deposits put together—methane extracted from methane hydrate is considered therefore a candidate for future fuels. - This should not be in the occurence section but in the Properties section.
- Occurence section and Alkanes in nature should be merged or be one under the other as they go toward a same goal, which is showing where these alkanes are present.
- In the Occurence section, the Today, the most important commercial sources ... text and what comes after should go into a section that explains why do we have the alkanes on the earth like Earth's alkane and its sources or so.
- ... within the individual fractions the boiling points lie closely together. - Some explanation on this point .would be greatly appreciated
- ... although the following demarcation is idealized and not perfect. - This statement is pov unless it is referenced or the word idealized is changed.
- The Preparation section is a bit short, needs images of the reactions or needs to be merged with the Purification section.
- The reactions should be labeled with names or be traced back to the publications where they were taken from.
Lincher 21:31, 4 June 2006 (UTC)
- trim down on conformation as it is already covered in Alkane stereochemistry, same goes for reactions of alkanes. Also too many subheaders V8rik 21:57, 4 June 2006 (UTC)
