An Unstable Paramagnetic Isopolyoxomolybdate Intermediate Non-Homogeneously Reduced at Different Sites and Trapped in a Host Based on Chemical Adaptability

Stabilize me: A metal oxide host with a trapped unstable {Mo36}‐type polyoxomolybdate guest exhibits independent reduced diamagnetic building blocks and paramagnetic centers (both types with colors other than the dark blue of the Mo centers). The guest in such systems is stabilized especially by a hydrogen‐bond network between the core and the shell.