# Name the following (be sure to identify the isomer):Cr(NH3)3(Cl)3-Pt(en)(Cl)2-([Pt(ox)2] 2– )-([Cr(H2O)5Br] 2+)-

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Name the following (be sure to identify the isomer):

Cr(NH3)3(Cl)3-

Pt(en)(Cl)2-

([Pt(ox)2] 2– )-

([Cr(H2O)5Br] 2+)-

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Step 1

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Cr(NH3)3(Cl)3

NH3 (ammine): oxidation number = 0

Cl (chlorido): oxidation number = -1

Overall charge of the complex = 0

Let the oxidation number of Cr (chromium) be ‘x’.

x + 0 + 3(-1) = 0

x = +3

⸫ The name of the complex is: Triammine trichlorido chromium(III)

This complex will show facial (fac) and meridional (mer) isomer.

Step 2

Pt(en)(Cl)2

en (ethylenediamine): oxidation number = 0

Cl (chlorido): oxidation number = -1

Overall charge of the complex = 0

Let the oxidation number of Pt (platinum) be ‘x’.

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