Talk:Infrared spectroscopy correlation table

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Assessment

This article suffers from insufficient context, and the table is not referenced (though references for IR correlations are widely available). Also, the format of the chart has an appearance that I find annoying. Otherwise, it's fine. Shalom (Hello • Peace) 01:17, 12 October 2007 (UTC)[reply]

Well this table is usually found in textbooks for organic chemists and not in encyclopedias. But the english version does not seem to be that strict about what Wikipedia is not. Matthias M. (talk) 17:03, 3 July 2009 (UTC)[reply]

I don't understand your comment. If we put in melting points, why not IR specs? OxygenBlue (talk) 10:41, 13 December 2012 (UTC)[reply]

Correlations

The methyl peak at 1260 cm^-1 (strong) is very specific for methyl bonded to silicium (CH₃-Si). This should be specified in the table. --Langbein Rise (talk) 08:40, 14 November 2008 (UTC)[reply]

New version

I have a draft new version of the table ready at my user page. Feel free to browse and comment. I could use some suggestions for a sortkey for the group column. Probably it is also a good idea to create a second, concise version of the table that lists only the most important absorption ranges and can function as a quick reference. --Tweenk (talk) 01:06, 18 January 2009 (UTC)[reply]

Yours looks good and it's referenced which is a big plus. Matthias M. (talk) 17:03, 3 July 2009 (UTC)[reply]

the one on your user talk is vastly better - I wish I had seen it sooner. —Preceding unsigned comment added by 82.1.124.141 (talk) 17:11, 20 October 2010 (UTC)[reply]

I approve the new one a lot! OxygenBlue (talk) 10:43, 13 December 2012 (UTC)[reply]

New version

Since it is mentioned, that IR is valuable for inorganic compounds, an extension with complexes and salts would be appropriate. Does anyone know if this is common available? OxygenBlue (talk) 10:41, 13 December 2012 (UTC)[reply]

I added a link to Kazuo Nakamoto (16 January 2009). Infrared and Raman Spectra of Inorganic and Coordination Compounds, Applications in Coordination, Organometallic, and Bioinorganic Chemistry. John Wiley & Sons. pp. 9–. ISBN 978-0-470-40587-1. Retrieved 13 December 2012. It may take some work to construct a table. --Kkmurray (talk) 13:57, 13 December 2012 (UTC)[reply]

Conversions to nm

I know it may be helpful to have IR data in nm but in most cases, anything after the first significant figure is meaningless. It's clear that a well-intentioned someone just converted each figure and copied the exact number to the table. Take this entry;

Bond	Type of bond	Specific type of bond	Absorption peak cm^-1 (nm)	Appearance
N-H	secondary amines	any	>3000 cm⁻¹ (>3333 nm)	weak to medium

In this case, >3000 cm⁻¹ is just giving a rough estimate for the lower bound on secondary amines, with a precision of only one significant figure. >3333 nm, on the other hand, suggests that this is a much more accurate measurement of the wavelength, and anyone relying on this page would consider 3400 nm to be out of this range. Also, greater than 3000 cm⁻¹ implies higher frequencies, whilst greater than 3333 nm implies lower (longer wavelength). I'm guessing the latter should be less than. Tomásdearg92 (talk) 15:29, 29 January 2013 (UTC)[reply]

Clarification

The fact that my suggested changes were incorrect and reverted, highlights the need for clarification regarding the intended bond and containing structure to remove ambiguity. Furthermore, it is not obvious whether the vibrations are stretching, or deformational. Plasmic Physics (talk) 23:31, 21 October 2014 (UTC)[reply]