Methenium
![Methenium (CH+3).](/Images/godic/202501/27/Methyl_cation.svg1641.png")
In organic chemistry, methenium (also called methylium, the methyl cation, or protonated methylene) is a positive ion with the formula CH+
3. It can be viewed as a methylene radical (:CH
2) with an added proton (H+), or as a methyl radical (•CH
3) with one electron removed. It is a carbocation and an enium ion, making it the simplest of the carbenium ions.