A cationic 24-MC-8 manganese cluster with ring metals possessing three oxidation states [MnII4MnIII6MnIV2 ((mu)4-O)2((mu)3-O)4((mu)3-OH)4((mu)3-OCH3)2(pko)12](OH)(ClO4)3

Reaction of Mn(ClO4)2 with di-pyridyl ketone oxime, (2-py)2CNOH, gives the novel cluster [MnII4MnIII6MnIV2((mu)4-O)2((mu)3-O)4((mu)3-OH)4((mu)3-OCH3)2(pko)12](OH)(ClO4)3 1. It is the only example of a 24 -MC-8, and the first metallacrown with ring metal ions in three different oxidation states. Magnetic measurements show antiferromagnetic behavior.