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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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
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