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I am looking for a free, very simple tool for IUPAC names of organic molecules.

I teach high school chemistry, and it would be fantastic to have an app or web tool that students could use to draw molecules and verify the systematic names of branched alkanes and simple alcohols, aldehydes, ketones, possibly acids; simple ethers, esters, cycloalkanes would be nice but aren't strictly necessary.

I do have MarvinSketch, but I find it too complex for absolute beginners, both to install and to use.
Chemdraw JS does not work well on mobile.

Suggestions?

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A bit more intuitive to interact with may be Chemdoodle Webcomponents which is a JavaScript library set-up to integrate well within webpages and mobile devices like phone or tablet, too. It comprises 2D/3D sketcher, a NMR predictor, and is freely available (open source GPL license). Derived from Chemdoodle, there is a structure -> name utility speking multiple dialects (e.g., IUPAC / CA, Hantzsch nomenclature), too.

Example: enter image description here

The interaction with Chemdoodle is nicely explained by Pritt Balagopal here on ChemSE.

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ChemAxon Ltd. offers a web tool at https://chemicalize.com/#/drawing .
Usage of "Chemicalize" requires a ChemAxon account, which is free but requires a name and e-mail to create.
Chemicalize is very easy to learn and use.
IUPAC names, as well as other basic properties are generated for molecules including up to 12 heavy atoms.

enter image description here

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