Question: Energies of orbitals can be explained by molecular orbital theory. It has been observed that in case of nitrogen molecules 2px is higher in energy than π 2Py and π 2Pz . Answer. In case of N, the energy gap between 2s and 2p atomic orbitals (AOs) is small. So, during formation of N 2 , these AOs intermix with each other. As a result molecular orbitals (MO), σ 2s and σ* 2s do not retain pure s character and MO σ 2Px and σ* 2Px do not retain pure p character. These entire MOs attain sp character. Due to this intermixing of atomic orbitals, σ2s and σ2s* becomes lower in energy and hence more stable while σ 2Px and σ* 2Px become higher in energy and hence less stable. Since, π 2Py and π 2Pz orbitals do not involve in intermixing, therefore energy of these orbitals remain the same. So, σ 2Px orbital becomes higher in energy than π 2Py and π 2Pz orbitals. Question: Draw energy diagram for N 2 molecules Question: Molecular orbital theory explain the paramagn...
We provide all level's students with simple and easy notes on chemistry. These notes include chemistry notes according to FBISE syllabus and solved exercises.