Write the coordination no and oxidation state of pt(en)2cl2
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The coordination sphere has 2 monodentate ligands, each with a negative charge (chloride ions) and 2 neutral bidentate ligands (ehtylene diamine). Since a bidentate and monodentate ligand form a coordinate bond through two and one atom(s) respectively, the coordination number here is (2*2)+(2*1)=6. Further, the net charge of the complex is zero while there are two chloride ions, each with a negative charge. Therefore, the Pt metal center will have a +2 oxidation state, which may also be written as Pt(II).
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