亜硝酸還元酵素活性中心モデル錯体の構造化学（1）－CubpaNO2 錯体のＸ線結晶構造解析
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概要
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The crystal structure of a model complex for the active center in nitrite reductase, Cu(II)(bis(2-pyridylmethyl)amine)NO2.ClO4, has been determined by X-ray diffraction method at －145 degrees centigrade. The copper atom has the square bipyramidal coordination geometry with three nitrogen atoms in planar bpa ligand (bpa; bis(2-pyridylmethyl)amine), two oxygen atoms in nitrite ion (NO2－), and an oxygen atom in ClO4 ion. Even though both oxygen atoms in nitrite ion are bonding to copper atom, the bond distances are quite different, Cu－O1 = 1.9726(14) and Cu－O2 = 2.5381(16)Å. Based on these distances, the nitrite ion is resulted to take chelate mode coordination with distinct bond distances.
- 2009-08-01