to give two O−H bonds and an in-plane lone pair. This MO treatment of water does not have two equivalent rabbit ear lone pairs. Hydrogen sulfide (H2S) too has a C2v symmetry with 8 valence electrons but the bending angle is only 92°. As reflected in its photoelectron spectrum as compared to water the 5a1 MO (corresponding to the 3a1 MO in water) is stabilised (improved overlap) and the 2b2 MO (corresponding to the 1b2 MO in water) is destabilized (poorer overlap). References External links MO diagrams at meta-synthesis.com Link MO diagrams at chem1.com Link Molecular orbitals at winter.group.shef.ac.uk Link Chemical bonding