Question

Select the correct IUPAC name for ${{\text{[PtC}}{{\text{l}}_{\text{4}}}{\text{]}}^{{\text{2 - }}}}$
(A) Tetrachloridoplatinum(ii) ion
(B) Tetrachloridoplatinum(2-) ion
(C) Tetrachloridoplatinate(ii) ion
(D) Tetrachloridoplatinate(2-) ion

Answer 1

The molecules or compounds having multiple metal centers surrounded by ligands (electron donating species) are known as Coordination compounds. These can be positively charged, negatively charged or neutral.

Complete step by step answer:
Co - ordination compounds: The molecules that have multiple metal centers and bounded by the ligands are known as co - ordination compounds.
Naming of Co - ordination compounds is done as follows:
step1: Ligands are named before the metal ion.
step2: Ligands are named with alphabetical order. Neutral ligands are given priority then the negative and positive charged ligands.
step3: Multiple occurrences of monodentate ligands(ligands having only one donor atom) are given prefixes such as di-, tri-, tetra-, penta-, etc.
step4: The ending of anions is changed during naming. ‘e’ is replaced by ‘-ido’ and ‘-ide’ is replaced by ‘-ate’.
step5: Neutral ligands are given their original names (some exceptions are there).
step6: To represent the oxidation state roman numerals are used.
step7: The end of the name is separated (name of cation or anion).
So according to the above steps the name of the co – ordination compound ${{\text{[PtC}}{{\text{l}}_{\text{4}}}{\text{]}}^{{\text{2 - }}}}$ is Tetrachloridoplatinate(ii) ion. The oxidation number can also be represented by the mathematical numbers so the name can also be written as Tetrachloridoplatinate(2-) ion.
Hence option (C) and option (D) are the correct answers.

Note:
Coordination compounds have a wide range of uses in our daily lives. It is used to make dyes and pigments. These compounds are used in analytical chemistry for various purposes such as colour test. Extraction of metals is done with the help of these complexes.