Metal Atom and neutral molecules/ions these are important things find in Coordination Compounds.
Metal Atoms are representing D and F block elements like Cu, Fe, Co, Ni.
Neutral molecules are called Ligands. Which have lone pair electrons?
like NH3, Cl, H2O, CN-
the metal atom is in Centre while neutral molecules/ions around the Metal atom.
Neutral molecules may be two types or more than two types
In this picture, You can see Cu is a Metal atom, and NH3 is a neutral molecule.
Central metal atom linked with ions/neutral molecules by the coordinate bond.
Coordinate Bond is a bond where a bond is formed by donating of lone pair electrons by one atom to another atom.
When central metal atom accepts lone pairs of electrons it carries positive charges. Hence they also called Complex Ion.
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For example > Cu is a Metal atom(Central metal atom) and NH3 is a Neutral molecule. Now NH3 have a pair of electrons for donation. So it will give lone pair electrons to Cu.
Now let me show you how to represent coordination compounds.
For example, there is a formula
some more example for Coordination compounds:-
[Fe(CN)6]4- K3[Fe(C2O4)3] [Co(NH3)4(H2O)Cl]Cl2 [Ni(CO)4]
How to find an oxidation number of Metal atom:-
1- To find a total charge on Coordination sphere.
2- To find a total charge on ligard.
for more detail please check our Youtube video:-
Coordination Compounds Metal Atom and neutral molecules/ions
If you want to download JEE main 2019 Question paper Please click on the below link.