This metal is the lowest-atomic-number element subject to the "oxo wall" predicted by ligand field theory, as it cannot attain a low enough d-electron count to form pi bonds with an oxygen atom.
Nitrile hydratases with this metal in their active site are distinguished by the presence of a VCTLC amino acid sequence. This metal is the lowest-atomic-number element subject to the "oxo wall" predicted by ligand field theory, as it cannot attain a low enough d-electron count to form pi bonds with an oxygen atom. The trivalent cation of this metal lies between vanadium 3+ and manganese 4+ in the fixed-ligand spectrochemical series, leading to large d-orbital splittings and low-spin states for its octahedral complexes. In this metal's 2+ oxidation state, it has a (*) d7 electron configuration. In humans, cofactors containing this metal have either an adenosyl or a methyl group axially bound to them, though in foods and supplements a cyano group is usually bound instead. The standard source for MÃ¶ssbauer spectroscopy is an isotope of this metal that decays to iron-57. For 10 points, name this metal that is the central atom in vitamin B12 and lies between iron and nickel on the periodic table.
Nitrile hydratases with this metal in their active site are distinguished by the presence of a VCTLC amino acid sequence.
cobalt