Why 4 bonds doesn't exist between carbon compounds?

1 Answer
Jan 3, 2018

see below.


I interpret you question to be why 4 bonds don't exist between carbon atoms if my interpretation is wrong , please comment below .

If there were 4 bonds between carbon atoms then the compound formed will be #C_2# .
This compound can exist. its structure is given below .
www.royal society of chemistry

such a compound is called diatomic carbon .

If you see you can easily make lewis structure of this compound but 4th covalent bond requires overlapping of d-orbital which is absent in carbon .

According to Shaik's report of 2012 this compound can exist but in isolated form , because it is extremely unstable and reactive.