Synthesis and mass spectrum of 3,3′-thiobispyridine and polarographic reduction of 1,1′-dimethyl-3,3′-thiobispyridinediium diiodide |
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Authors: | Lindsay A. Summers Sylvia Trotman |
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Affiliation: | Department of Chemistry, The University of Newcastle, 2308, New South Wales, Australia |
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Abstract: | 3,3′-Thiobispyridine is prepared by reaction of pyridine-3-thiol with 3-bromopyridine. The base peak in the mass spectrum of 3,3′-thiobispyridine is due to the molecular ion which fragments by loss of H, HCN and CS as well as by central bond rupture. The 1,1′-dimethyl diquaternary salt of 3,3′-thiobispyridine is reduced polarographically by a one electron transfer not involving hydrogen to an unstable radical cation at a potential (Eo) of −0.72 V in the pH range 7.4–11.2. |
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