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Q. Name of the complex anion?
The name of the complex anion always ends in 'ate' and the Latin name of the metal atom is used. No specific ending is used for neutral or cationic complex species. For example, K2[PtC[6] is called potassium hexachloroplatinate(1V) and K[Ag(CN)2] is named as potassium dicyanoargentate.
A little space is given between the name of the cation and the anion. No space or hypen is used anywhere else.
Once the complex entity is completely identified according to the above rules, no mention of the number of cations or anions used for charge balancing is required. For example, [Co(NH3)6]CI3 is called hexaamminecobalt(III) chloride and not hexaamminecobalt(I1I) trichloride. Similarly, K2[K6] is named potassium hexachloroplatinate(1V) and not dipotassium hexachloroplatinate(1V).
If a ligand has more than one donor atom, the actual atom involved in the bond formation with the metal ion is indicated by putting italicised symbol of the atom after B the name of the ligand. For example, [Ag(S203)2] is called dithiosulphato- S-argentate(1) ion. Some exceptions in this connection should be remembered. These are:
SCN thiocyanato
-NCS isothiocyanato
-NO2 nitro
-ONO nitrito
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