Importantly, this proposed model (spin transitions from S = 2 to S = 1, and finally to S = 0) provides a more reasonable interpretation of the observed structural changes in this series. Namely, if the changes in the magnetic moment between 150K and 25 K corresponded to converting one of the dimers from S = 1 to S = 0, then that dimer should not undergo additional changes between 25 and 12 K. However, (A) (B) and as noted above, a significant desymmetrization of the dimer is noted upon cooling to 12 K. This further geometric change wouldn't be expected if the dimer was in an S = 0 state through this transition but is consistent with a spincrossover event for the conversion of an S = 1 dimer to a singlet. Thus, the spin-state changes proposed here from theory provide an alternative and plausible interpretation of the magnetic and structural data in this compound.