## Atto: EasyChem Chemical Structure and Equation Editor

atto_easychem
Maintained by Carl LeBlond
Chemical structure and equation editor much like the Moodle equation editor. Requires filter_easychem.
105 sites
3 fans

Chemical equation and structure editor much like the Moodle equation editor.  It utilizes Easychem.js which was developed by Peter Win.  Easily create chemical structures and equations and insert into your content.  More documentation on the Easychem identifier scripts are available at www.easychem.org.  Requires the EasyChem Chemical Structure and Equation Filter.

### Contributors

• Sat, 17 Jan 2015, 4:56 AM
• Mon, 16 Nov 2015, 7:07 PM
Note that as of September 2015 Peter Win's easyChem has been 'rebranded' CharChem and is now hosted at http://charchem.org (though http://easychem.org currently still works).
The Terms of Use remain that the system can be used free of charge for the purposes of research and education.

• Sat, 23 Apr 2016, 1:45 AM
I have installed it, but all of structures can not show in preview of question. Ex
I inserted code: [% H_(y0.5)C\CH|CH//C\HC||HC/#2; #5_(y0.5)H %] in question text box, but I can not see anything when click to question preview?
help me please and thanks so many

• Mon, 25 Apr 2016, 8:17 PM
Hi Hoang - Did you install the filter also and have it enabled in the course your using?
• Tue, 26 Apr 2016, 7:25 AM
I think I did it all, I had removed and installed it many times, too. But it is not OK. This is some pictures about it.
• Tue, 26 Apr 2016, 7:30 AM
does cause give that I used the moodle 2.9 version for your easychem?:D
• Wed, 27 Apr 2016, 7:45 PM
It could be as I have not tested in Moodle 3.0. I'll take a look this week when i get a chance.
• Wed, 27 Apr 2016, 8:07 PM
I just tested in Moodle 3.0 and it worked fine. I even created a question and it worked. You picture link does not work.
• Wed, 27 Apr 2016, 8:37 PM
OK I got your word file link to work. Can you send me a screen shot of your question text in HTML mode. (Click on the HTML button). When I pasted you expression in it did not work since it got wrapped in a tag. Remove the tag and it should work fine.
• Wed, 27 Apr 2016, 8:41 PM
Sorry the tag got removed by moodle.org. It was a tt tag.
• Thu, 28 Apr 2016, 5:34 AM
yes, that is my screen shot:

I removed tag

in mode

[% |_p7_p7_p7_p7_p7_p7_o_(y-1,N0)_q_q_q_q_o %]

to
[% |_p7_p7_p7_p7_p7_p7_o_(y-1,N0)_q_q_q_q_o %]
and
[% |_p7_p7_p7_p7_p7_p7_o_(y-1,N0)_q_q_q_q_o %]
and
`|_p7_p7_p7_p7_p7_p7_o_(y-1,N0)_q_q_q_q_o
it did not work finally
thank you though for watching
our education is bad and now I want to do smt for it, but it seem so difficult

• Thu, 28 Apr 2016, 5:37 AM
does this cause may be the filter, sir?
• Tue, 24 May 2016, 9:49 PM
this is video of my proplem
I has tried many ways since your last message, but it has not shown