IUPAC name of $[P t (N H_{3})_{2} C l (N O_{2})]$ is
(a) Platinum diaminechloronitrite
(b) Chloronitrito-N-ammineplatinum (II)
(c) Diamminechloridonitrito-N-platinum (II)
(d) Diamminechloronitrito-N-platinate (II)

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Solution

Correct IUPAC name can be written as
The ligands present in the given coordination compound are
(i) $N H_{3}$ represented as amine
(ii) $C l^{+}$ represented as chlorido
(iii) $N O_{2}^{-}$ represented as nitrito-N
According to IUPAC rule, ligands are named in an alphabetical order before the central atom. Prefix di-will be used to indicate the number of $N H_{3}$ ligands present.
The oxidation state of metal is indicated by a Roman numeral in parenthesis.
So, IUPAC name will be
diamminechloronitrito-N-platinum (II)
Hence, option (c) is correct.

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