Final answer:
The IUPAC name of the compound Mn2(SO3)3 is Manganese(III) sulfite.
Step-by-step explanation:
The IUPAC name of the compound with the chemical formula Mn2(SO3)3 is Manganese(III) sulfite. The naming convention for transition metal compounds involves indicating the oxidation state of the metal cation with Roman numerals. Since Mn has an oxidation state of +3 in this compound, and the compound comprises sulfite ions, SO3-, the correct name is Manganese(III) sulfite.