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IUPAC name of [Cr(NH_3)_6]^{3+}

  • Option 1)

          Hexamminechromium (VI) ion

  • Option 2)

                Hexamminechromium (III) ion

  • Option 3)

    Hexamminechromium (II) ion

  • Option 4)

    Hexamminechloride

 

Answers (1)

best_answer

As  we have learned

Writing the name of Complex compound formula -

(i) Cation is named first 

(ii) ligands are named in alphabetical order before name of central metal atom.

(iii) Prefixes, mono, di, tri are used to indicate the no of ligands

(iv) when name of ligand used a numerical prefix, then term bix, tris, tetrakis are used.

eg:

\left [ Ni\ Cl_{2}\left ( PPh_{3} \right )_{2} \right ]

is named as dichlorobis (triphenylphosphine)nickel(II)

(v) Oxidation state is represented by roman numerical in parenthesis

(vi) If the complex ion is an anion, the name of metal ends with suffix -ate

eg: co in complex anion \left [ Co\left ( SCN_{4} \right ) \right ]^{2-}

is called cobaltate.

fe - ferrate

- wherein

 

 

 

 In the given ion [Cr(NH_3)_6]^3+, the oxidation state of chromium is +3 and here 6NH_3 ligand are attached to the central metal atom. Therefore its IUPAC name is hexamminechromium (III) ion.

 


Option 1)

      Hexamminechromium (VI) ion

Option 2)

            Hexamminechromium (III) ion

Option 3)

Hexamminechromium (II) ion

Option 4)

Hexamminechloride

Posted by

satyajeet

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