Sigma Bonding Electron density lies between the nuclei a bond may be formed by s-s, p-p, s-p or hybridized orbital overlaps The bonding mo is lower in energy than the original atomic orbitals The antibonding Mo is higher in energy than the atomic orbitals > Chapter 2Chapter 2 4 Sigma Bonding • Electron density lies between the nuclei. • A bond may be formed by s-s, p-p, s-p, or hybridized orbital overlaps. • The bonding MO is lower in energy than the original atomic orbitals. • The antibonding MO is higher in energy than the atomic orbitals. =>