The IUPAC name for a binary covalent compound will lack roman numerals.
Binary covalent compound comprises of two elements which forms a
compound through the sharing of electrons.
The sharing of electrons is referred to as covalent bonding and naming such
compounds require prefixes such as mono-, di- , tri- etc.
The standard method of naming these compounds should be with the
prefixes and not with the roman numerals.
An example is carbon(IV)oxide which is wrong in IUPAC naming.
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