How do you name CH3Br?
1 Answer
Nov 14, 2016
Well, you need to know what the name of the alkyl chains are, and the stem for the substituent.
- Alkyl groups are chains of
CH bonds, such asH3C−(CH2)n− .
The most common ones are:
Meth− : one carbon in the main chain
Eth− : two carbons in the main chain
Prop− : three carbons in the main chain
But− : four carbons in the main chain
Pent− : five carbons in the main chain
Hex− : six carbons in the main chain
Hept− : seven carbons in the main chain
Oct− : eight carbons in the main chain
Non− : nine carbons in the main chain
Dec− : ten carbons in the main chain
- Substituents are non-hydrogens, such as
−Br ,−Cl ,−OH ,−NH2 , etc. They each have their own stems, such as bromo, chloro, hydroxyl, or amino, in that order.
You have at least two ways you can name
- Bromo + meth + ane, because a bromine substituent (bromo) is on a one-carbon alkyl chain (meth-), and the alkyl chain has no double or triple bonds (making it a haloalkane compound, specifically a bromoalkane compound, as compared to a bromoalkene or a bromoalkyne).
- Meth + yl brom + ide, because the one-carbon chain has the prefix "meth-", the "yl" is for hydrocarbon chains that are not terminated on the second end by a
CH3 , and bromide is the name of theBr− anion.
So, two possible names are bromomethane or methyl bromide.
