:File:Dimethylacetylene cyclotrimerisation with titanium tetrachloride catalyst.jpg

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| description =Catalytic cycle for the cyclotrimerisation of 2-butyne (dimethylacetylene) to form hexamethylbenzene, catalysed by titanium tetrachloride and triisobutylaluminium. Mechanism derived for Advanced Organic Chemistry by Jerry March.

| source = Image created by user:EdChem and uploaded the same day. Hopefully this crude image will be replaced shortly with a properly drawn SVG shortly. Chemical structures are not copyrightable so this image is in the public domain.

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| additional_information = This is a temporary file awaiting a properly-drawn replacement, which will be suitable for Commons but this is not as it is inappropriate for long-term inclusion in article space. Once the replacement is in place, the uploader (user:EdChem, me) will request removal under CSD

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{{Do not move to Commons|reason=This is a temporary file awaiting a properly-drawn replacement, which will be suitable for Commons but this is not as it is inappropriate for long-term inclusion in article space. Once the replacement is in place, the uploader (user:EdChem, me) will request removal under CSD}}

Image created by user:EdChem and uploaded the same day. Hopefully this crude image will be replaced shortly with a properly drawn SVG shortly. Chemical structures are not copyrightable so this image is in the public domain.