2. Osmium Tetroxide:
Oxidising agent.
Toxic, Volatile and Expense
Osmium in OsO4 is in +8 Oxidation state.
Extremely electron deficient.
Dihydroxylation of Alkenes gives 1,2-diol products.
Osmium(VI) species can be oxidized or reduced and hydrolyses to
release the diol product.
Accelerated by tertiary amines and other bases, such as pyridine.