# [NTG-context] Typesetting chemical reaction equations

Hans Hagen pragma at wxs.nl
Fri Jan 27 17:43:41 CET 2006

```Ville Voipio wrote:
>> And how do I switch off the equation numbering for the chemical
>> reactions (I'd like to have the mathematical formulae still numbered)?
>>
>
> Stupid me. Just by leaving the \placeformula out. (Maybe I should go and
> get something to eat, my brain seems to be in some sort of energy-saving
> mode.)
>
> By the way, is there a simple way to have two separate numbering
> schemes? If I wanted to have chemical formulae numbered with 1,2,3,4...
> and maths with i, ii, iii, iv, ... , how should I do it? It must be
> documented with \placeformula, but is \placeformula documented anywhere
> apart from the code itself? (Yes, I am lazy.)
>
well, i can make a \defineformulaplacement; remind me

Hans

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