Formula of a complex What is the formula of complex

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Formula of a complex

   The following rules are followed - while writing formula of complex 

1:- Formula of +ve ion (cation) weather simple or complex is written followed by - ve
ion (anion).

2:-  The coordination sphere is Written in the square bracket in which metal atom or ion is written first followed by ligands .

3:-  Ligands are listed in the order  - ve Ligands , natural Ligands , + ve ligands . If there are more than one ligands of any type are listed alphabetically.

4:- The charge of complex ion is calculated by knowing the oxidation state of the metal atom or ion and charges on ligands . Charge on a complex ion = oxidation state of the metal + algebraic sum of the charge present on all the ligand .

5:- The total amount of cation and anions present in one molecule of a complex can be calculated by knowing the charge carried by each ions . The cation and anions are multiplied by such whole numbers that total positive and negative charges become zero.

6:- sometime abbreviation for certain ligands are used in parentheses instead of their formula.

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