Theory of symmetry breaking in water?

As we all know $$\ce{H2O}$$ is bent ($$C_\mathrm{2v}$$) in its ground state equilibrium structure, rather than linear ($$D_\mathrm{\infty h}$$), which can be readily understood e.g. from the MO diagram of bent versus linear case:

The question, that puzzles me here, is if that apparent case of "symmetry breaking" can be described by a Jahn-Teller or Renner-Teller effect? Jahn-Teller seemingly is ruled out since the "high symmetric" from is linear, which is excluded from the Jahn-Teller theorem while the Renner-Teller effect is apparently a subtle ro-vibronic effect.

Since the water ground state is a closed shell singlet (even in the linear case), my take on it would be, that it must be a second-order JT-effect of coupling between ground and excited states by virtue of the bending distortion. But I am not sure since I never heard or read about water as a second-order JT-example.

Can anyone comment on that?

• Check out Albright et al. Orbital Interactions in Chemistry 2ed pp 131-9 – orthocresol Jan 23 '19 at 12:43
• @orthocresol: So it means: Perfectly normal second order JT, if I understand correctly? – Rudi_Birnbaum Jan 23 '19 at 13:40
• I think so, but will refrain from giving a more certain answer, I only briefly flicked through. – orthocresol Jan 23 '19 at 14:03