Talk:Proton nuclear magnetic resonance

message: :Image:NMR table.JPG is being used on this article. I notice the image page specifies that the image is being used under fair use but there is no explanation or rationale as to why its use in this Wikipedia article constitutes fair use. In addition to the boilerplate fair use template, you must also write out on the image description page a specific explanation or rationale for why using this image in each article is consistent with fair use.
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BetacommandBot (talk) 23:28, 2 January 2008 (UTC)
replies: text: The vanillin spectrum picture was deleted from Wikimedia because of questionable copyright status.  I inserted two H-1 NMR spectra images into this article, one of menthols in the introduction and one of ethyl acetate further down.  H Padleckas (talk) 03:10, 25 January 2012 (UTC)
thread_title: Fair use rationale for Image:NMR table.JPG

message: I'm having a hard time figuring out what is meant by this sentence (found in the "Spin-spin couplings" section):
The peak in the spectrum would be split into ten lines according to the (n + 1) rule of multiplicity.
Where did the number "ten" come from, and what is a "line" in this context?  What is the "(n+1) rule of multiplicity"?
--68.20.214.52 (talk) 04:51, 17 July 2008 (UTC)
replies: text: That clarifies a bit (though I have since read it elsewhere).  I still take issue with the use of the word "line".  Now that I've done further reading elsewhere, I understand how it is used, but in the context of this article, it is not explained that each "sub-peak" is referred to as a line.  When I first read the article, it didn't make sense to me. --68.20.214.52 (talk) 16:56, 18 July 2008 (UTC)

text: I made a small additional change. The rest of the article uses "peaks" to describe the individual lines of a multiplet, and the sentence under discussion used "lines". I changed it to "peaks".  I think most NMR spectroscopists (in fact all types of spectroscopists who observe sharp absorptions) use "lines" in this context, but to do so here would require switching to "lines" throughout the article. I also added a bit on when the simple first-order rules outlined in the section fail. There should probably be much more here, considering the importance of NMR spectroscopy in chemistry. May tackle it sometime, and also add some better spectra (I have plenty that are not copyright restricted).ChemistHans (talk) 19:02, 21 July 2008 (UTC)
thread_title: Please clarify a paragraph

message: Can someone please clarify the "satellites are always caused by 13C nuclei" part - a blatant untruth!  
Nessa Carson (talk) 15:43, 22 May 2011 (UTC)
thread_title: Incorrect info!

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thread_title:  External links modified (January 2018) 

message: Can someone add a clarifying caption or something to the table? Raccoonery (talk) 17:14, 23 January 2024 (UTC)
thread_title:  The table of functional groups