Summary
2-Pyridylphenylacetonitrile (ppa) is oxidized by iron(III) chloride in dry ethanol to 1,2-dicyano-1,2-di(phenyl)-1,2-(2-pyridyl)ethane (dcppe). When 1,2-dichloroethane or ether are used as solvents, a 3∶1 complex of dcppe with iron trichloride, [(FeCl3)3(dcppe)] is obtained.
Titanium(IV), vanadium(IV) and chromium(III) chlorides react with ppa and dcppe, giving complexes of general formulae [MCl4(ppa)] (M = Ti or V), [CrCl3(ppa)n] (n = 2 or 3), [(MCl4)2(dcppe)] (M = Ti or V) and [CrCl3(dcppe)].
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Masaguer, J.R., Mendiola, M.A. Reactions of 2-pyridylphenylacetonitrile and 1,2-dicyano-1,2-di(phenyl)-1,2-di(2-pyridyl)ethane with titanium(IV), vanadium(IV), chromium(III) and iron(III) chlorides. Transition Met Chem 10, 243–246 (1985). https://doi.org/10.1007/BF00621077
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DOI: https://doi.org/10.1007/BF00621077