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- W2014568114 abstract "Die Reaktionen des 3,3,6,6-Tetramethyl-1-thia-4-cycloheptins (1) mit Nickeldibromid und Palladiumdichlorid führen zu den entsprechenden Cyclobutadien-Komplexen 2 bzw. 3, während Umsetzung von 1 mit Pentacarbonyleisen den Alkin-Komplex 5 liefert. Der Cyclobutadien-Tricarbonyleisen-Komplex 4 wird durch eine Ligandenübertragungsreaktion aus 3 mit Pentacarbonyleisen gewonnen. Aus dem Palladiumdichlorid-Komplex 3 wird mit Ethylenbis(diphenylphosphan) das Cyclobutadien 6 freigesetzt. Dies stellt das erste durch sterische Effekte stabilisierte, bei Raumtemperatur isolierbare Cyclobutadien-Derivat dar; seine Eigenschaften werden diskutiert. Isolable Cyclobutadienes, II1). — Synthesis and Properties of a Cyclobutadiene Stabilized by Steric Effects Reaction of 3,3,6,6-tetramethyl-1-thia-4-cycloheptyne (1) with nickel dibromide and with palladium dichloride affords the corresponding cyclobutadiene complexes 2 and 3, respectively, whereas reaction of 1 with pentacarbonyliron yields the alkyne complex 5. The cyclobutadiene-tricarbonyliron complex 4 is obtained via a ligand transfer reaction from 3 with pentacarbonyliron. Treatment of the palladium dichloride complex 3 with ethylenebis (diphenylphosphane) leads to the cyclobutadiene 6. This represents the first cyclobutadiene derivative stabilized by steric effects which is isolable at room temperature; its properties are discussed." @default.
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- W2014568114 date "1978-05-31" @default.
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- W2014568114 title "Synthese und Eigenschaften eines durch sterische Effekte stabilisierten Cyclobutadiens" @default.
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- W2014568114 doi "https://doi.org/10.1002/jlac.197819780309" @default.
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