Question

IUPAC name of CHF2CBrClF?

Answer 1

1-bromo-1-chloro-1,2,2-trifluoroethane

Explanation:

There are two carbons, so the root of the name will be '-ethane'

We need to number the carbon atoms `1` or `2`, so I'll choose the carbon bonded to Br, Cl and F to be the first carbon, since it has the most non-hydrogen substituents on it.

Therefore, there is one chlorine on the 1-carbon, one bromine on the 1-carbon, and one fluorine on the 1-carbon. There are also two fluorines on the 2-carbon, so we have:

1-chloro
1-bromo
1,2,2-trifluoro
and,
ethane

We list the prefixes in the IUPAC name in alphabetical order, so in full it is

1-bromo-1-chloro-1,2,2-trifluoroethane.