Talk:Degree of unsaturation

LaTeXation complete

I think we should include some examples, since the formula is being written for everyone.

I typeset the formula. However, wouldn't it make more sense to represent it in this simplified version?

$n_{C}-{\frac {n_{H}}{2}}+1$

Twinxor t 21:28, 8 April 2006 (UTC)

I agreed so I changed it. Isopropyl 21:40, 8 April 2006 (UTC)

Comment by AStudent

I had 4 good ones on there, where did they go? AStudent

Oxygens, Nitrogens, Halides

Don't these affect the degree of unsaturation?142.58.43.188 (talk) 17:09, 22 October 2008 (UTC)

halides do, oxygen and nitrogen don't. i've changed it.--75.62.179.247 (talk) 02:28, 30 November 2008 (UTC)

Yes! Where is the nitrogens? The description in the article confuses reader how to count the nitrogens. --石 (talk) 14:44, 8 December 2008 (UTC)

Now the article ignores nitrogens and other trivalent atoms. I suggest the following formula: $1+{\frac {1}{2}}\sum n_{i}(v_{i}-2)$ where $n_{i}$ is the number of atoms with valence $v_{i}$. For example, in the formula C_nH_x, we have the DU as 1 + (n(4-2) + x(1-2))/2 = 1 + (2n-x)/2, which gives the same result as the current formula. Bbi5291 (talk) 00:50, 14 January 2009 (UTC)

No objections for a month! It's edited. Bbi5291 (talk) 15:15, 21 February 2009 (UTC)