The energy of the occupied valence MOs of H 2 S is shown as a function of the HSH bond angle Compared to the analogous diagram, Figure 24 11, for H 2 O, the 2a1 MO energy decreases more as the bond angle approaches 90 degrees Explain, based on the MO diagram, why H 2 S is bent, and why its bond ang...

The diagram is almost the same as that for water but ...

The energy of the occupied valence MOs of H 2 S is shown as a function of

Question:

The energy of the occupied valence MOs of H₂S is shown as a function of the H€•S€•H bond angle. Compared to the analogous diagram, Figure 24.11, for H₂O, the 2a1 MO energy decreases more as the bond angle approaches 90 degrees. Explain, based on the MO diagram, why H₂S is bent, and why its bond angle (92°) is smaller than the bond angle in water.

For comparison, also offer a bond-angle explanation based on hybridization rather than on the MO diagram.

-0.3 1b, 2a, -0.5 1b2 -0.7 -0.9 1a, 90 110 130 150 170 H-S-H angle (degrees) MO energy (Hartree)