Multi-electron reactivity of a cofacial di-tin(ii) cryptand: partial reduction of sulfur and selenium and reversible generation of S₃˙.

ABSTRACT: Cofacial bimetallic tin(ii) ([Sn₂(mBDCA-5t)]^2-, 1) and lead(ii) ([Pb₂(mBDCA-5t)]^2-, 2) complexes have been prepared by hexadeprotonation of hexacarboxamide cryptand mBDCA-5t-H₆ together with double Sn(ii) or Pb(ii) insertion. Reaction of 1 with elemental sulfur or selenium generates di-tin polychalcogenide complexes containing μ-E and bridging μ-E₅ ligands where E = S or Se, and the Sn(ii) centers have both been oxidized to Sn(iv). Solution and solid-state UV-Vis spectra of [(μ-S₅)Sn₂(μ-S)(mBDCA-5t)]^2- (4) indicate that the complex acts reversibly as a source of S₃˙^- in DMF solution with a K_eq = 0.

SUBMITTER: Stauber JM 

PROVIDER: S-EPMC5450590 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature