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- W1570607046 abstract "Several organosodium compounds with the carbanions benzyl (phenylmethadine), diphenylmethyl (diphenylmethadine), o-xylyl (o-methylphenylmethadine) and 1-phenyllethyl (1-phenylethadine) have been synthesized as base adducts with TMEDA (tetramethylethylenediamine) or PMDTA (pentamethyldiethylenetriamine) and studied by X-ray diffraction methods. Their structures are the result of ionic interactions between solvated Na ions and carbanions in combination with steric effects. Always a maximum number of shorter (ca. 260 pm) and longer (up to 300 pm) NaC contacts is achieved, often by formation of cyclic tetramers or polymer chains. The following compounds have been investigated in detail: [benzylsodium(PMDTA)]n (3), [o-xylysodium(TMEDA)]4 (4), [diphenylmethylsodium(TMEDA)]4, (5), diphenylmethylsodium(PMDTA) (monomer) (6) and [1-phenylethylsodium(TMEDA)]4 (7). Es wurden verschiedene organonatrium-Verbindungen mit den Carbanionen Benzyl (Phenylmethanid), Diphenylmethyl (Diphenylmethanid), o-Xylyl (o-Methylphenylmethanid) und 1-Phenylethyl (1-Phenylethanid) als Basenaddukte mit TMEDA (Tetramethylethylendiamin) oder PMDTA (Pentamethyldiethylentriamin) synthetisiert und röntgenographisch untersucht. Ihre Strukturen sind das Ergebnis von ionischen Wechselwirkungen zwischen den solvatisierten Na-Ionen und Carbanionen in Kombination mit sterischen Effekten. Stets bildet sich eine maximale Anzahl von kürzeren (ca. 260 pm) und längeren (bis 300 pm) NaC-Kontakten aus, wodurch vielfach cyclische Tetramere oder Polymerketten ten entstehen. Im Einzelnen wurden untersucht: [Benzylnatrium-(PMDTA)]n (3), [o-Xylynatrium-(TMEDA)]4 (4), [Diphenylmethylnatrium(TMEDA)]4 (5), Diphenylmethylnatrium(PMDTA) (monomer) (6) und [1-Phenylethylnatrium(TMEDA)]n (7)." @default.
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- W1570607046 date "1991-09-01" @default.
- W1570607046 modified "2023-10-07" @default.
- W1570607046 title "Über Metallalkyl- und Aryl-Verbindungen" @default.
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- W1570607046 doi "https://doi.org/10.1016/0022-328x(91)80130-c" @default.
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