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Question

The correct IUPAC name of [Pt(NH3)2Cl2] is:

A
diamminedichloridoplatinum (II)
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B
diamminedichloridoplatinum (IV)
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C
diamminedichloridoplatinum (0)
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D
dichloridodiammineplatinum (IV)
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Solution

The correct option is B diamminedichloridoplatinum (II)
Ligands are named in alphabetical order. Ammine comes before chlorido ligand. Hence, option (D) is ruled out. The oxidation state is written ib roman numerals. The correct oxidation state of platinum is +2. Hence, options (B), (C) and (D) are ruled out.
Let X be the oxidation state of platinum. The oxidation state of ammonia is 0. The oxidation state of chlorine is 1.
X+2(0)+2(1)=0
X2=0
X=+2.
Thus the correct name of the compound is diamminedichloridoplatinum(II)

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