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Question

Write IUPAC names of the following:
(i) [Co(NH3)5Cl]Cl2
(ii) [Pt(NH3)2Cl(NO2)]

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Solution

IUPAC names:
(i) [Co(NH)3)5]Cl]Cl2
Pentaammine chloro cobat (III) chloride.
The prefix penta means five. The names of ligands appear in alphabetical order. The oxidation state of metal is written in roman numerals in parenthesis.
(ii) [Pt(NH3)2Cl(NO2)].
Diammine chloro nitro platinum(II)
The prefix di means two. The names of ligands appear in alphabetical order. The oxidation state of metal is written in roman numerals in parenthesis.

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