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. 2022 Feb 3;27(3):1039. doi: 10.3390/molecules27031039

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Four examples of original flawed chemical reaction records. The obvious error is marked by a purple pentagram. (a) sodium (Na) does not belong to reactants, the methanol serves as a solvent; (b) the iodide ion does not belong to this reaction, the methylene dichloride serves as a solvent role; boron tri-chloride and the ammonium ion do not contribute mass to the product and do not belong to the reactant; (c) Pd is catalyst, the sodium methanolate serves as a base, and the methyl alcohol is solvent; (d) the methyl alcohol is solvent, the HCl provides an acidic environment and is assigned to the reagent role.