Mn2O72
Mn2O72 is not a recognized chemical compound or ion. The typical oxidation state of manganese in common oxides and oxoanions is less than +7. For instance, manganese heptoxide is Mn2O7, where manganese is in the +7 oxidation state. The notation "Mn2O72" suggests a diatomic manganese species with a charge of 2-, but this combination does not correspond to a stable or commonly observed chemical entity. It is possible that "Mn2O72" is a typographical error or refers to a highly unstable or theoretical species not widely documented in chemical literature. Standard chemical nomenclature and databases do not list a compound or ion with this formula. Further clarification on the intended chemical species would be necessary for a meaningful description.