Using \left( ... \right) in <chem> environment: "TeX parse error: Missing or unrecognized delimiter for \left"
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	SalixAlba
	Nov 12 2017, 3:59 PM

Description

In the chemical formula

<chem>\left( \frac{a}{2} + \frac{b}{3} \right) O</chem>

I get an error TeX parse error: Missing or unrecognized delimiter for \left

A live example is at https://en.wikipedia.org/w/index.php?title=User:Salix_alba/sandbox&oldid=809956844

The error stems from trying to convert the first formula in https://en.wikipedia.org/wiki/Chemical_oxygen_demand to use the chem environment.

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SalixAlba created this task.Nov 12 2017, 3:59 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptNov 12 2017, 3:59 PM

Aklapper renamed this task from \left( ... \right) in <chem> environment. to Using \left( ... \right) in <chem> environment: "TeX parse error: Missing or unrecognized delimiter for \left".Nov 12 2017, 9:53 PM

Pkra moved this task from Inbox to Chemistry on the Math board.Dec 7 2018, 11:31 AM

IIUC, <chem> / <ce> wraps the content in \ce{} to pass it to the mhchem extension (which has a separate parser).

So this would be expected behavior.

IIUC, <chem> / <ce> wraps the content in \ce{} to pass it to the mhchem extension (which has a separate parser).

Confirmed: https://github.com/wikimedia/mediawiki-extensions-Math/blob/acc203d059f42bc92a62867b7d9f55e0eca3b336/src/MathHooks.php#L407

Closing this as expected behavior. Please re-open if I misunderstood the OP.

Aklapper added a project: Math-Chemistry-Support.Jun 24 2020, 5:38 AM

Aklapper moved this task from Chemistry to Inbox on the Math board.Jun 24 2020, 5:39 AM

Using \left( ... \right) in <chem> environment: "TeX parse error: Missing or unrecognized delimiter for \left"Closed, DeclinedPublicActions

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Using \left( ... \right) in <chem> environment: "TeX parse error: Missing or unrecognized delimiter for \left"
Closed, DeclinedPublic
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