R. G. Sutherland

The synthesis and mass spectral fragmentation of some 1,2-disubstituted tricerbonyl-η-cyclopentadienyimanganese derivatives: 2-lithiation of tricarbonyl(η-NN-dimethylsulphamoylcyclopentadienyl)manganese

Tricarbonyl(η-NN-dimethylsulphamoylcyclopentadienyl)manganese (Ic) is metallated in the 2-position to give the intermediate (II) which can be trapped by electrophilic reagents to give 1,2-disubstituted tricarbonyl-η-cyclopentadienylmanganose derivatives (III) whose 1H n.m.r. and mass spectral fragmentation are discussed as are those of tricarbonyl(η-azidosulphonylcyclopentadienyl)manganese (Ia).

Behaviour of 1,3-diferrocenylalkenes and 1,2-diferrocenylethylene in strong acid. Apparent intramolecular reduction of α-ferrocenyl carbocations

The reactions of 1,3-diferrocenylalkenes and 1,2-diferrocenylethylene in 98% sulphuric acid are described. Reduction of the alkene to an alkane occurs concomitant with oxidation of the two iron atoms to the FeIII state. The reaction is considered to involve a novel intramolecular electron transfer from the iron to a carbocation centre in a ferrocene molecule. The behaviour of 2-ferrocenylpropan-2-ol in concentrated sulphuric acid yielding 2,4-diferrocenyl-2-methylpentane is rationalized by the same mechanism.

Photochemistry of 2,3-epoxy-3-phenylpropiophenones

Die 2.5stundige UV-Photolyse des trans-Epoxids (I) in N2-durchstromtem Methanol bei 15-16°C ergibt als Hauptprodukt das Dion (II), den Aldehyd (III) und dessen Oxidationsprodukt, die Saure (IV) (Ausbeute an Spaltprodukten 18-20%).