Final answer:
The IUPAC name for COF₂ is carbonyl fluoride, following the rules for naming binary compounds with prefixes indicating the number of atoms and the compound's structure.
Step-by-step explanation:
The correct IUPAC name for COF₂ is carbonyl fluoride. This compound consists of a carbon atom double-bonded to an oxygen atom and bonded to two fluorine atoms.
According to IUPAC nomenclature rules for naming binary compounds (compounds with two different elements), we first name the element that is less electronegative, which is carbon in this case, followed by the more electronegative element, fluorine, with its name ending in -ide. When naming binary compounds, prefixes are used to indicate the number of atoms of each element.
However, for the first element, carbon in this case, the prefix mono- is typically omitted if there is only one atom. The second element, fluorine, has the prefix di- to indicate that two fluorine atoms are present. Becuase it is a molecule with multiple types of bonds (a double bond to oxygen and single bonds to fluorine), the naming reflects the significant functional group, which is the carbonyl (C=O) group, and fluoride for the presence of fluorine.