Sunday, May 3, 2020

Inner-metallic complexes-definition-examples-pH dependent


What is an inner-metallic complexes in chemistry ?


Inner-metallic complexes are those co-ordination complexes in which the ligand possess both neutral and acidic donor atom or group.

When a chelating ligand with both neutral as well as acidic group, form  one type of chelating complexes ,in which both the primary and the secondary valency of central metal atom is satisfied by the ligand simultaneously.

Then the resulting chelate complexes are called inner-metallic complexes .

What is an inner-metallic complexes in chemistry ?

For example, copper glycinate , [ Cu ( gly )2 ] , zinc acetyl acetonate, [ Zn (acac )2] etc.

The ligands used in the formation of inner-metalliccomplexes are , glycinate anion, acetyl acetonate anion and other amino acid etc.

What is an inner-metallic complexes in chemistry ?

All the Inner-metallic complexes are chelate complexes, but all the chelate complexes are not Inner-metallic complexes .

Because, inner-metallic complexes are neutral complex compound , but chelate compounds are may be cationic, anionic or neutral type .

Why are inner metallic complexes pH dependent ?


The ligands which are used in the formation of inner-metallic complexes are contained both neutral and acidic donor atom or group .

They satisfied both the primary and the secondary valency of central metal ion simultaneously.

Hence, inner-metallic complexes are generally neutral chelate complex. So, the pH value of inner-metallic complexes is 7, just middle point on the pH scale.


Summary


What is an inner-metallic complexes in chemistry ?
Examples of inner-metallic complexes.
Why are inner metallic complexes pH dependent ?



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