EXAMPLES OF WARNER'S COORDINATION THEORY
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CoCl3. 6NH3 Complex: In this compound, the coordination number of cobalt is 6 and NH3 molecules satisfy all the 6 secondary valencies. ...
CoCl3. 5NH3 complex: In this compound, cobalt has the coordination number of 6. ...
CoCl3.
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In 1823, Werner put forth this theory to describe the structure and formation of complex compounds or coordination compounds. It is because of this theory that he got the Nobel prize and is known as the father of coordination chemistry.
CoCl3.6NH3 Complex: In this compound, the coordination number of cobalt is 6 and NH3molecules satisfy all the 6 secondary valencies. Chloride ions satisfy the 3 primary valencies. These are non-directional in character. These chloride ions instantaneously precipitate on the addition of silver nitrate. The total number of ions, in this case, is 4, three chloride ions and one complex ion.
CoCl3.5NH3 complex: In this compound, cobalt has the coordination number of 6. However, we see that the number of NH3molecule decreases to 5. The chloride ion occupies the remaining one position. This chloride ion exhibits the dual behaviour as it has primary as well as secondary valency.