# What are ketoximes?

I am reading a book which is saying about the Syn-Anti nomenclature of oximes. It is showing this molecule to be Syn-methyl-ethyl ketoxime.

I can't understand what is a ketoxime and how is there nomenclature done. Can somebody explain please ?

An oxime is a chemical compound belonging to the imines, with the general formula $\ce{(R^1)(R^2)C=N-O H}$,

How is the nomenclature of methyl-ethyl ketoxime done?

1. On the left side you can see "$\ce{CH3-CH2 -}$" (ethyl).
2. On the right side you can see "$\ce{CH3 -}$" (methyl).
3. On the middle you can see "$\ce{C=N-O-H}$" (ketoxime).
According to the old IUPAC recommendations (1979 as well as 1993), compounds having the general structure $\ce{R-CH=N-OH}$ or $\ce{RR'C=N-OH}$ are called generically ‘oximes’. They are further classified as ‘aldoximes’ and ‘ketoximes’, respectively. They are named by placing the functional class name ‘oxime’ as a separate word after the name of the corresponding aldehyde $\ce{R-CH=O}$ or ketone $\ce{RR'C=O}$, respectively.