Fig 5 11
Aqueous solutions of
complexes of
nickel(II) with an
increasing number
of ethane-1,
2-diamine ligands [Ni(H O) ]
(aq)
2
6
2+
[Ni(H O)
]
(aq)
2
4
en2+
[Ni(H O)
]
(aq)
2
4
2+
en2
[Ni(en) ]
(aq)
3
2+
Colour of Some Gem Stones
The colours produced by electronic transitions within the d orbitals of a
transition metal ion occur frequently in everyday life