6
Coordination Chemistry
Many metal ions form aggregate with Lewis bases which are stable in solution, such species are known as coordination compounds or complex compounds. A complex may be positive ion, a negative ion or even neutral. It depends upon the charge of the metal ion and the donor. Example,
[Co(NH3)6]+3, |
O.N.of cobalt is +3 and NH3 is neutral. |
[Fe(CH6]4−, |
O.N. of iron is Fe2+ and cyanide ion (CN) is uninegative |
[Cu(H2NCH2OO−)2], |
O.N. of copper is +2 and glycinate ion is uninegative. |
Complex compound are made by chemical species which have independent existence, such as Co+3, Fe3+, Cu2+, NH3 CN− etc. Thus, complexes are chemical compounds which contain a metal ion, surrounded by Lewis bases and the aggregate retain ...
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