State the rules for writing the IUPAC names of co-ordination compounds.

Explanation

(i) In ionic complexes cation is named first and then the anion.
(ii) In co-ordination entity ligands are named first then the central metal ion atom.
(iii) (a) Anionic ligands ends in 'O'

(b) Cation ligands end in 'ium'
`NO^(+) "Nitrosonium" " " NO_(2)^(+) "Nitronium"`
( c ) Neutral ligands are named as such with few exceptions.

(iv) When more than one type of ligands are present, they are named in alphabetical order.
(v) Prefixes di, tri, etc.... are used to indicate the number of the individual ligands in the co-ordination entity.
(vi) When the names of the ligands include a numerical prefix, then the terms bis, tris, tetrakis are used.
(vii) When the complex is cationic or neutral, the names of the metal is written without any characteristic ending. For anionic complex, the name of the central metal atom ends in 'ate'.

(viii) Oxidation state of the metal atom/ion is indicated by Roman numeral in parenthesis.