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- W2484077612 abstract "Several key cobalt(II/III) hexaamine systems are discussed in which steric factors enhance electron transfer rates by a factor of more than 106 and effect redox potential changes in excess of 1.2 V. In some instances conformational isomers alone show dramatic differences. Electron transfer rates between ob3and lel3conformations of metal ion cages arising from Λ[Co(R-pn)3]2+/3+ and Λ[Co(S-pn)3]2+/3+ ions (pn = 1, 2-propanediamine) vary by more than 103 fold. The larger cavity [Co(Me8-tricosaneN6)]3+ ions (Me8-tricosaneN6 = 1,5,5,9,13,13,20,20-octamethyl-3,7,11,15,18,22-hexaazabicyclo[7.7.7]tricosane) have orange and blue conformations that differ in redox potential by >0.5 V. X-ray crystal structure views of the orange form and of the unusually air-stable cobalt(II) complex as their nitrate salts are presented. Also, solid-state 59Co NMR and reflectance spectra imply a very weak ligand field at the cobalt site of the blue form." @default.
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- W2484077612 date "1997-05-05" @default.
- W2484077612 modified "2023-10-08" @default.
- W2484077612 title "Steric Effects in Redox Reactions and Electron Transfer Rates" @default.
- W2484077612 doi "https://doi.org/10.1021/ba-1997-0253.ch008" @default.
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