Werner theory of coordination compounds ppt
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Werner’s Theory
Metals exhibit two types of valencies in the formation of complexes.
These are primary valencies and secondary valencies.
1. Primary valencies correspond to oxidation number (ON) of the metal and are satisfied by anions. These are ionisable and non-directional.
2. Secondary valencies correspond to coordination number (CN) of the metal atom and are satisfied by ligands. These are non-ionisable and directional. Hence, geometry is decided by these valencies.
Metals exhibit two types of valencies in the formation of complexes.
These are primary valencies and secondary valencies.
1. Primary valencies correspond to oxidation number (ON) of the metal and are satisfied by anions. These are ionisable and non-directional.
2. Secondary valencies correspond to coordination number (CN) of the metal atom and are satisfied by ligands. These are non-ionisable and directional. Hence, geometry is decided by these valencies.
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Hey !!
WERNER'S THEORY OF COORDINATION COMPOUND
Werner was able to explain the nature of bonding in complexes. The brief outlines of Werner's Theory are as : Metal shows two different kinds of valencies.
- Primary Valencies :- They are satisfied by anions and equal to the oxidation state of the metal.
- Secondary Valencies :- They are satisfied either by oppositely charged ions or neutral molecules and sometimes by cationic groups. Secondary valencies are equivalent to coordination number and they are directed in space in specific number around each central metal atom within the lattice.
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