Changing mixed-valence state of hexacobalt cluster by substituting central metal ion and by electrochemical reduction - Different mixed-valence states of [M{Co(prolinato(2)}(6)](4+)(M = Ba2+ and La3+)

Komiyama T; Igarashi S; Hoshino Y; Yukawat Y

Chemistry Letters, Vol.34, No.3, 300-301, 2005

DOI10.1246/cl.2005.300 Export Citation

Changing mixed-valence state of hexacobalt cluster by substituting central metal ion and by electrochemical reduction - Different mixed-valence states of [M{Co(prolinato(2)}(6)](4+)(M = Ba2+ and La3+)

Komiyama T, Igarashi S, Hoshino Y, Yukawat Y

Clusters, Ba{Co(prolinato)(2)}(6) and La{Co(prolinato)(2)}(6), which are bridged by prolinato ligands, were crystallized as [M{Co(prolinato)(2)}(6)](ClO4)(4). The Ba{Co(pro)(2)}(6) cluster has two Co-III and four Co-II and the La{Co(pro)(2)}(6) cluster has one Co-III and five Co-II; i.e., the mixed-valence state of the cobalt cluster is different according to the oxidation number of the central ion. The both mixed-valence clusters change into divalent hexacobalt clusters by electrochemical reduction.