9 . If the complex ion is a cation , the metal is named same as the element .
10 . The neutral complex molecule is named similar to that of the complex cation .
Some examples are ( i ) [ Cr ( NH3 ) 3 ( H2O ) 3 ] Cl3 triamminetrichlorochromium ( III ) chloride
( ii ) [ Co ( H2CH2CH2H2 ) 3 ] 2 ( SO4 ) 3 tris ( ethane-l , 2-diamine ) cobalt ( III ) sulphate
( iii ) [ Ag ( NH3 ) 2 ] [ Ag ( CN ) 2 ] diamminesilver ( I ) dicyanoargentate ( I )
( iv ) K4 [ Fe ( CN ) 6 ] potassium hexacyanoferrate ( II )
Isomerism in Coordination Compounds Coordination compounds exhibit the following types of isomerism : 1 . Structural Isomerism
In this isomerism . isomers have different bonding pattern . Different types of structural isomers are
( i ) Linkage isomerism This type of isomerism is shown by the coordination compounds having ambidentate ligands . e . g .,
[ Co ( NH3 ) 5 ( NO2 )] Cl and [ Co ( NH3 ) 5 ( ONO )] Cl or pentaammine nitrito- N Cobalt ( III ) chloride and pentaammine nitrito-O ’ Cobalt ( III ) chloride .
( ii ) Coordination isomerism This type of isomerism arises from the interchange of ligands between cationic and anionic complexes of different metal ions present in a complex , e . g .,
[ Cr ( NH3 ) 6 ) [ CO ( CN ) 6 ] and [ CO ( NH3 ) 6 ] [ Cr ( CN ) 6 ]