Posted: Sun Nov 24, 2019 1:41 pm
How is sp3 hybridization energetically favorable for the atom if it involves the promotion of an electron from a lower energy s orbital to a higher energy sp3 hybridized orbital?
Re: sp3 hybridization
Posted: Sun Nov 24, 2019 1:48 pm
The characteristic tetravalence of carbon is due to the small promotion energy of a carbon atom. This energy is small because a 2s-electron is transferred from an orbital that it shares with another electron to an empty 2p-orbital. Although the promoted electron enters an orbital of higher energy, it experiences less repulsion from other electrons than before it was promoted. As a result, only a little energy is needed to promote the electron.