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  2. Answer please! - Co-ordination Compounds - JEE Main-7
# Engineering

IUPAC name of  [Co(NH_3)_5NO_2]Cl_2

  • Option 1)

    Pentamminenitrocobalt (III) chloride

  • Option 2)

     Pentamminenitrosocobalt (III) chloride

  • Option 3)

    Pentamminenitrocobalt (II) chloride

  • Option 4)

     None of these

 

Answers (1)
A Aadil Khan

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 compounds [Co(NH_3)_5NO_2]Cl_2, the oxidation state of cobalt is +3 and here 5 NH_3 ligand, a NO_2 ligand are attached to the central atom. therefore its name is pentaamminecobalt (III) chloride.

 


Option 1)

Pentamminenitrocobalt (III) chloride

Option 2)

 Pentamminenitrosocobalt (III) chloride

Option 3)

Pentamminenitrocobalt (II) chloride

Option 4)

 None of these

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