Treatment of
(η5-X-substituted-cyclohexadienyl)tricarbonylmanganese
complexes (X =
alkoxy, halogeno, dimethylamino and thio) with hydrides and a proton
source gave
η5-cyclohexadienyl complexes resulting from a cleavage of
the C−O, C−Cl, C−N and C−S
bonds: The η3-substituted cyclohexenyl intermediates
underwent elimination of an agostic
hydrogen and the alkoxy, halogeno, amino, or thio group.
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