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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?

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

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

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

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

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

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

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) reply

Now the article ignores nitrogens and other trivalent atoms. I suggest the following formula: ${\displaystyle 1+{\frac {1}{2}}\sum n_{i}(v_{i}-2)}$ where ${\displaystyle n_{i}}$ is the number of atoms with valence ${\displaystyle v_{i}}$. 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) reply

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