What is the IUPAC name of [Co(CN)6]³- and [ Cr(H20)6]³+
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IUPAC NAMING OF CO-ORDIANTION COMPOUNDS
In IUPAC nomenclature, the basic rules are :-
- The name of ligend is mentioned before the name of central metal ion.
- If the co-ordination sphere is negatively charged, the name of central metal ion ends with the suffix 'ate' . Sc - Scandate , Cr - Chromate , Co - Cobaltate
- The name of negatively charged li ends with 'ido'
For example :- Chlorido, Bromido, Iodido
- The oxidation state of central metal ion is mention inside a bracket.
- For a similar ligend attached more than one time, we use the prefix :- Di, Tri , Tetra, Penta , Hexa .
- Ligend are arranged in alphabetical order of their names but the prefix like Di , Tri etc. are not considered.
- For bidentate ligend ,we use bis . For example :- bis(ethane-1,2-diamine)
* Ligend is not the correct spelling,it is due to some technical issues
SOLUTIONS :-
Considering above rules, The IUPAC name of the complexes will be :-
[Co(CN)6] ³- => Hexacyanocobalate(iii) ion
[Cr(H20)6]³+ => HexaaquaChromium(iii) ion
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