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- W1983058897 abstract "All attempts to prepare “inidene” compounds [Ln E(R) MLn]+ (A) with E Se or Te in the bridging position up until now had been unsuccessful. Although the sulphur analogue [Cp(CO)2Mn]2SPh+ is stable in the “open” form(A) characteristic of “inidene” compounds, the selenium and tellurium analogues seem to inevitably exist in the valence isomeric ring closed form [LnM-E(R)-MLn]+ (B) only. Thermodynamic analyses of the ring opening equilibrium AαB, which had been observed with some sulphur and selenium compounds, led to the hypothesis that sterically demanding substitution at the residue R should make accessible the ring opened forms A. This hypothesis has been confirmed by the synthesis and characterisation of [Cp′(CO)2 Mn]2EMes+ (E Se (1), Te (2); Cp′=η5-CH3C5H4). Amongst all compounds of analogous composition [Cp′(CO)2Mn]2ER+ (E Se, Te) which have been synthesized by now, compounds 1 and 2 are the first and hitherto only compounds of the “inidene”-type A. Alle Versuche, “Iniden”-Komplexe [LnME(R) MLn]+ (A) mit ESe oder Te in der Brückenposition aufzubauen, waren bisher gescheitert. Obwohl das Schwefel-analoge [Cp(CO)2Mn]2-SPh+ in der für “Iniden”-Komplexe charakteristischen “offenen” Form (A) stabil ist, lagen die Selen- und Tellur-Analoga scheinbar unausweichlich in der valenzisomeren ringgeschlossenen Form [LnM-E(R)-MLn]+ (B) vor. Aus der thermodynamischen Analyse des Ringöffnungsgleichgewichts AαB, das an einigen Schwefel und Selenverbindungen hatte beobachtet werden können, war nun die Hypothese abgeleitet worden, daß ringgeöffnete Formen A durch sterisch anspruchsvolle Substitution am Rest R zugänglich sein sollten. Die Synthese und Charakterisierung von [Cp′(CO)2MN]2EMes+" @default.
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- W1983058897 date "1992-11-01" @default.
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- W1983058897 title "Trigonal-planar koordiniertes Selen bzw. Tellur in [Cp′(CO)2Mn]2EMes+ (E Se, Te): Verbindungen vom “Iniden”-Typ" @default.
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- W1983058897 doi "https://doi.org/10.1016/0022-328x(92)83482-w" @default.
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