Das durch Umsetzung von Benzylmagnesiumchlorid (I) mit Diäthylsulfat entstandene 3:1‐Gemisch aus (II) und (III) reagiert mit Quecksilber(II)‐chlorid zu den Quecksilberverbindungen (IV) und (V), aus denen durch Reduktion mit Lithiumaluminiumhydrid das Quecksilber wieder herausgespalten wird.
4-exo-triehloromethylcyelohexa-2,5-dien-1-one)rhodiumas a novel approach to the synthesis of metal-coordinated nonbenzenoid aromatics of the tropone seriesThe possibility of redox troponization of a gem-polyhalomethylated semiquinoid system, n-coordinated to a metal atom, was shown in relation to the reaction of (qS-cyclo-
pentadienyl)(q4-4-methyl-4-exo-trichloromethylcyclohexa-2,5-dien-l-one )rhodium withPd(PPh3) a. The reaction occurs with retention of the metal coordination affording a sevenmembered organometallic derivative of the nonbenzoid aromatic series, namely, (qS-cyclopentadienyl)(rl4-4-chloro-5-methylcyclohepta-2,4,6-trien-1 -one)rhodium, whose structure was established by means of elemental analysis, NMR, and mass-spectral data.
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