This element catalyzes the cycloaddition of a nitrile with two equivalents of acetylene to form pyridine derivatives.
This element catalyzes the cycloaddition of a nitrile with two equivalents of acetylene to form pyridine derivatives. Sepulchrate ligands are typically coordinated to this metal, whose inert hexammine complex ion forms a chloride salt employed as the chief model of Alfred Werner. Unusually for its row, the plus three oxidation state of this metal generally forms only low-spin octahedral complexes, in contrast to this metal's high-spin plus two complexes, whose pink solutions change (*) color when acid is added. This non-rhodium metal catalyzes the Bönnemann cyclization and hydroformylation. Gamma Knives irradiate tumors using the synthetic 60 isotope of this metal, whose alumina salts produce blue pigments. This metal acts as a cofactor for methionine synthase, which binds a vitamin containing it in a corrin ring. For 10 points, name this ferromagnetic metal found in vitamin B12, with chemical symbol Co.
This element catalyzes the cycloaddition of a nitrile with two equivalents of acetylene to form pyridine derivatives.
cobalt [or Co before mentioned]