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Intramolekulare Umwandlung von syn- und anti- Tricarbonyl(1-ethoxy-1,2-dihydrocyclobutabenzol)chrom; Abfangreaktion des ortho-Chinodimethan-Intermediats

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Leresche, James
Published in Angewandte Chemie. 1990, vol. 102, no. 4, p. 421 - 423
Abstract The reversible isomerization of syn-1 to anti-1 occurs without cleavage of metal-ligand bonds, as demonstrated through a [4 + 2] cycloaddition with trans-1,2-bis(trimethylsilyl)ethene as the dienophile, which led to the trapping of an ortho-quinodimethane intermediate. Further evidence comes from kinetic studies. Ring opening in 1 proceeds considerably more slowly than in the case of the non-complexed analogue, a finding that can be explained by entropy effects.
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KUNDIG, Ernst Peter et al. Intramolekulare Umwandlung von syn- und anti- Tricarbonyl(1-ethoxy-1,2-dihydrocyclobutabenzol)chrom; Abfangreaktion des ortho-Chinodimethan-Intermediats. In: Angewandte Chemie, 1990, vol. 102, n° 4, p. 421 - 423. https://archive-ouverte.unige.ch/unige:6668

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