he coordination compounds , metal complexes or simply complexes are compounds which contain an ion or a central atom, usually a metal, surrounded by a collection of ions or molecules. The chance discovery dell\'esamminocobalto (III) chloride, CoCl 3 6 NH 3 , due to Tassaert in 1798 marks the beginning of the chemistry of the complexes. Many of the jobs immediately after they were made ??with ammonia and complex that resulted were called metallammine. Subsequently it was found that other amines and other anions such as CN - , NO 2 - , NCS - , Cl - can form complexes with metals. Many compounds were prepared with these anions and, at first, were called by the name of the chemical that prepared them first. Subsequently, because of the fact that many of these complexes was colored, was used a scheme of nomenclature based on the color. Our current knowledge about the nature of the metal complexes are due to Werner , in 1893 at the age of 26 years suggested that even today is called coordination theory of Werner. His most important are three postulates: Most of the elements have two types of meaning: a) primary valence and b) secondary valence. In modern terminology a) corresponds to the oxidation state and b) the coordination number Each element tends to satisfy the valence both primary and secondary The secondary valence is directed towards fixed positions of the space Consider the complex cloroamminocobalto (III). According to the theory of Werner the first member of the series has the formula Co [(NH 3 ) 6 ] Cl 3 and is represented as shown in the figure: (i upload for u on this address: Structures http://i45.tinypic.com/2l2654.gif http://i50.tinypic.com/jaykgy.jpg) The primary valence or oxidation state of the cobalt (III) is 3. The three ions Cl - primary saturate the valence of cobalt chloride ions and then the three primary saturate the valence of cobalt negative ions that neutralize the positive charge of the metal ion affect the primary value. Solution he coordination compounds , metal complexes or simply complexes are compounds which contain an ion or a central atom, usually a metal, surrounded by a collection of ions or molecules. The chance discovery dell\'esamminocobalto (III) chloride, CoCl 3 6 NH 3 , due to Tassaert in 1798 marks the beginning of the chemistry of the complexes. Many of the jobs immediately after they were made ??with ammonia and complex that resulted were called metallammine. Subsequently it was found that other amines and other anions such as CN - , NO 2 - , NCS - , Cl - can form complexes with metals. Many compounds were prepared with these anions and, at first, were called by the name of the chemical that prepared them first. Subsequently, because of the fact that many of these complexes was colored, was used a scheme of nomenclature based on the color. Our current knowledge about the nature of the metal complexes are due to Werner , in 1893 at the age of 26 years suggested that even today is called coordination .

1. he coordination compounds , metal complexes or simply complexes are compounds
which contain an ion or a central atom, usually a metal, surrounded by a collection of ions or
molecules. The chance discovery dell'esamminocobalto (III) chloride, CoCl 3 6 NH 3 , due to
Tassaert in 1798 marks the beginning of the chemistry of the complexes. Many of the jobs
immediately after they were made ??with ammonia and complex that resulted were called
metallammine. Subsequently it was found that other amines and other anions such as CN - , NO
2 - , NCS - , Cl - can form complexes with metals. Many compounds were prepared with these
anions and, at first, were called by the name of the chemical that prepared them first.
Subsequently, because of the fact that many of these complexes was colored, was used a scheme
of nomenclature based on the color. Our current knowledge about the nature of the metal
complexes are due to Werner , in 1893 at the age of 26 years suggested that even today is called
coordination theory of Werner. His most important are three postulates: Most of the elements
have two types of meaning: a) primary valence and b) secondary valence. In modern terminology
a) corresponds to the oxidation state and b) the coordination number Each element tends to
satisfy the valence both primary and secondary The secondary valence is directed towards fixed
positions of the space Consider the complex cloroamminocobalto (III). According to the theory
of Werner the first member of the series has the formula Co [(NH 3 ) 6 ] Cl 3 and is represented
as shown in the figure: (i upload for u on this address: Structures
http://i45.tinypic.com/2l2654.gif http://i50.tinypic.com/jaykgy.jpg) The primary valence or
oxidation state of the cobalt (III) is 3. The three ions Cl - primary saturate the valence of cobalt
chloride ions and then the three primary saturate the valence of cobalt negative ions that
neutralize the positive charge of the metal ion affect the primary value.
Solution
he coordination compounds , metal complexes or simply complexes are compounds
which contain an ion or a central atom, usually a metal, surrounded by a collection of ions or
molecules. The chance discovery dell'esamminocobalto (III) chloride, CoCl 3 6 NH 3 , due to
Tassaert in 1798 marks the beginning of the chemistry of the complexes. Many of the jobs
immediately after they were made ??with ammonia and complex that resulted were called
metallammine. Subsequently it was found that other amines and other anions such as CN - , NO
2 - , NCS - , Cl - can form complexes with metals. Many compounds were prepared with these
anions and, at first, were called by the name of the chemical that prepared them first.
Subsequently, because of the fact that many of these complexes was colored, was used a scheme
of nomenclature based on the color. Our current knowledge about the nature of the metal
complexes are due to Werner , in 1893 at the age of 26 years suggested that even today is called
coordination theory of Werner. His most important are three postulates: Most of the elements

2. have two types of meaning: a) primary valence and b) secondary valence. In modern terminology
a) corresponds to the oxidation state and b) the coordination number Each element tends to
satisfy the valence both primary and secondary The secondary valence is directed towards fixed
positions of the space Consider the complex cloroamminocobalto (III). According to the theory
of Werner the first member of the series has the formula Co [(NH 3 ) 6 ] Cl 3 and is represented
as shown in the figure: (i upload for u on this address: Structures
http://i45.tinypic.com/2l2654.gif http://i50.tinypic.com/jaykgy.jpg) The primary valence or
oxidation state of the cobalt (III) is 3. The three ions Cl - primary saturate the valence of cobalt
chloride ions and then the three primary saturate the valence of cobalt negative ions that
neutralize the positive charge of the metal ion affect the primary value.