A cluster complex, Mn₄O₄(L)₆ (L = [P(O^tBu)₂O₂^–]), was reported by Van Allsburg, et al. in Chem. Eur. J. 2015, 21, 4646.

1. What is the average oxidation state of Mn is this complex? Show your work.

2. The crystal structure of this cluster was solved, and the bond metrics of the [Mn₄O₄] unit are given below (Figure 1). The authors determined that the oxidation state of each Mn ion is best described with integer values (Mn^{III (+3}) and/or Mn^{IV (+4)}), meaning the oxidation states are localized on each metal rather than averaged over the cluster. Explain how the authors concluded from the given data which Mn ions would be labeled as Mn^III or Mn^IV (Figure 1b)?

 

Transcribed Image Text:

P3 Mn1 Mn4 [P6 ५२० Mn3 -P5 Mn2 P4 R Mn1 (III) 1.958(3) 1.850(4) 1.899(3) Mn1 (III) 2.183(3) 1.848(3) 1.872(3) 04 04 2.177(4) 1.869(3) Mn3 (IV) 1847(3 1.878(4) 1.893(3) Mn4 (IV) 772017 Mn2 87 4(2) 02 2.040(4) 01 Mn3 (IV) Figure 1. a) The structure of [Mn,O,(O₂P(OtBu)₂] (1). For the first of the two molecules in the asymmetric unit. Thermal ellipsoids are set at 50% proba- bility. Carbon and hydrogen atoms are omitted for clarity; b) Detailed struc- ture of the Mn,O, core, including M-Oaxo distances in A; c) The Mn₂O₂ face containing Mn1 and Mn3, including angles in degrees. P3 Mn1 Mn4 [P6 ५२० Mn3 -P5 Mn2 P4 R Mn1 (III) 1.958(3) 1.850(4) 1.899(3) Mn1 (III) 2.183(3) 1.848(3) 1.872(3) 04 04 2.177(4) 1.869(3) Mn3 (IV) 1847(3 1.878(4) 1.893(3) Mn4 (IV) 772017 Mn2 87 4(2) 02 2.040(4) 01 Mn3 (IV) Figure 1. a) The structure of [Mn,O,(O₂P(OtBu)₂] (1). For the first of the two molecules in the asymmetric unit. Thermal ellipsoids are set at 50% proba- bility. Carbon and hydrogen atoms are omitted for clarity; b) Detailed struc- ture of the Mn,O, core, including M-Oaxo distances in A; c) The Mn₂O₂ face containing Mn1 and Mn3, including angles in degrees.

Answer rating: 100% (QA)

What is the average oxidation state of Mn is this complex Show your work The average oxidation state of Mn in this complex is 35 To calculate the aver... View the full answer