Reductive dehalogenation in Fe(CO)"5-mediated photolysis of 3-halo- and 3,4-dihalo-2,5-dimethylthiophene 1,1-dioxides - Usieli, V.; Gronowitz, S.; Andersson, I. (Elsevier)
Irradiation of 3,4-dibromo-, 3,4-dichloro- and 3-chloro-2,5-dimethylthiophene 1,1-dioxide in the presence of pentacarbonyliron caused successive reductive dehalogenation of the substrates, and π-complexation of the parent compounds and of the reduced products to tricarbonyliron. A mechanism for the dehalogenation is suggested. The mass spectral fragmentation patterns of the thiophene dioxides and of the complexes are discussed.
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