Question

NH4[Cr(NCS)4(NH3)2] what is the IUPAC name of the coordination compound ​

Answer 1

Answer:

The IUPAC name of the compound  NH₄[Cr(NCS)₄(NH₃)₂] is    Ammoniumdiamminetetrathiocyanato-N chromate(|||)

Explanation:

NH₄[Cr(NCS)₄(NH₃)₂]

• Name of the cation - Ammonium

• Ligands

                four  -NCS  groups - tetrathiocyanato-N

                 two -NH₃ groups - diammine

• The Central metal atom -Chromate

since Chromium Cr is in an anionic complex it is named chromate.

• The oxidation state of Central atom

                 NH₄⁺  → ON = 1

                 -NCS → ON = -1

                   NH₃ → ON = 0

                             where ON is oxidation number

   since it is a neutral complex, we can write

         1 + x + 4×-1 + 0 = 0                       where x is oxidation state of Cr

⇒                             x = 3

Hence, the IUPAC name of the compound is Ammoniumdiamminetetrathiocyanato-N chromate(|||)