Coordinate bond is the bond formation when one atom donates the lone pair but shared between the 2 atoms. Here we will discuss the many molecules forming coordinate bond.
What is coordinate bond
It is the bond formation when one atom donates the lone pair but shared between the 2 atoms.
Formation of Coordination bond between NH3 with BF3
- In ammonia molecule, N has 5 valence electrons. 3 electrons of N shares between N and 3 H atom.
- N atom donates one lone pair to electron deficient molecule BF3.
- Therefore, one coordinate bond is present between electron rich NH3 with electron deficient BF3.
- Hence, both of the atoms N and B completes their octet.
Formation of Sulphur dioxide molecule
- Sulphur as well as Oxygen atom has both 6 valence electrons.
- Central atom Sulphur shares 2 bond pairs with one Oxygen atom.
- But S atom donates one electron pair to other O atom.
- This results in the formation of C.B. between S and O atom.
Coordinate bond in terms of Valence bond Approach
A bond forms by the overlap of orbital containing a lone pair of electrons with an empty orbital of another atom.
Formation of ammonium ion, NH4+
N atom in NH3 contains one hybrid orbital containing a lone pair of electrons. This orbital overlaps with the empty s orbital of H+ ion forming a coordinate bond.
Formation of hydronium ion (H3O+) ion
The O atom in H2O molecule contains 2 Sp3 hybrid orbitals, containing a lone pair of electrons. One of these orbitals overlaps with the empty orbital of H+ ion forming a coordinate bond.
Check out the post on shape of molecule on the basis of hybridisation having lone pair and bond pair here :
For more updates join me on
You Tube Channel :
Website :
