Question

Which of the following is the correct IUPAC name of any complex compound?
A.Tris (acetylacetonate)iron (III) chloride
B.Hexachloroplatinum (IV) tetraamminedicyanoplatinum (IV)
C.Amminebromochloromethylamineplatinum (II)
D.Cis-dichloro(ethylenediamine)platinum (II)

Answer 1

Hint: In a coordination compound, the cation is always named before the anion. To name the complex ion, the ligands are always named first, in alphabetical order, then the metal atom or ion. Greek prefixes like di-, tri- and tetra-. are used to designate the number of each type of ligand in the complex ion. The central metal is named only after naming the ligands. The oxidation state of the metal in the complex is given as a Roman numeral in parentheses following the name of the metal.

Complete step by step answer:
The IUPAC name Tris (acetylacetonate)iron (III)chloride is not correct. Its correct name is Tris(acetylacetonate)iron (III). The molecule is neutral and cannot have chloride ligand.
The IUPAC name Hexachloroplatinum (IV)tetraamminedicyanoplatinum (IV) is also not correct and its correct name is Tetraamminedicyanoplatinum (IV)hex chloroplatinate (IV) because Tetraamminedicyanoplatinum (IV) is the complex cation and is named first. Hexachloroplatinate (IV) is the complex anion and is named after the name of the complex cation.
Amminebromochloromethylamineplatinum (II)) represents the correct IUPAC name. All the ligands are named in the alphabetical order and also the charge on the central metal ion and the charge on the complex is balanced with appropriate charges on the ligands. The oxidation state of the complex is written in roman parenthesis. The names of the ligand and the metal are correctly spelled.
Lastly, The IUPAC name Cis-dichloro(ethylenediamine)platinum (II) is also not correct. Its correct name is Dichloro (ethylenediamine) platinum (II). The prefix cis is not necessary as it is a square planar complex containing a bidentate ligand and trans isomer is not possible.
Thus, the IUPAC name Amminebromochloromethylamineplatinum (II) is correct.

Therefore, the correct answer is option (C).

Note: The metal atom or ion is written before the ligands in the chemical formula. In naming the central metal, If the complex ion is a cation then the metal is named the same as the element and If the complex ion is an anion then the name of the metal ends with the suffix –ate.