Siegfried Corbelin

Über Metallalkyl- und Aryl-Verbindungen: Organonatrium-Verbindungen mit Benzyl-, Xylyl-, Diphenylmethyl- und 1-Phenyl-Ethyl-Carbanionen☆

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) NaC 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 ).