Über das salzartige Verhalten der Alkalialkyle in Metallalkylen als Lösungsmitteln

Hein, Fr.; Petzchner, E.; Wagler, K.; Segitz, Fr. A.

doi:10.1002/zaac.19241410114

Cited by 93 publications

(18 citation statements)

References 10 publications

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“…This concept proved to be very successful and still is applied until today. Beginning with benzyllithium, which owes its stability also to delocalization of its negative charge in the adjacent π system, a number of corresponding α‐substituted methyl groups has been developed (Scheme ). Another important example of phenyl‐substituted methyllithium is triphenylmethyllithium (LiCPh 3 ).…”

Section: Organolithium Compoundsmentioning

confidence: 99%

200 Years of Lithium and 100 Years of Organolithium Chemistry

Wietelmann

Klett

2018

Zeitschrift anorg allge chemie

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The element lithium has been discovered 200 years ago. Due to its unique properties it has emerged to play a vital role in industry, esp. for energy storage, and lithium‐based products and processes support sustainable technological developments. In addition to the many uses of lithium in its inorganic forms, lithium has a rich organometallic chemistry. The development of organometallic chemistry has been hindered by synthetic problems from the start. When Wilhelm Schlenk developed the basic principles to handle and synthesize air‐ and moisture‐sensitive compounds, the road was open to further developments. After more information was available about the stability and solubility of such compounds, they started to play an essential role in other fields of chemistry as alkyl or aryl transfer reagents.

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Section: Organolithium Compoundsmentioning

confidence: 99%

200 Years of Lithium and 100 Years of Organolithium Chemistry

Wietelmann

Klett

2018

Zeitschrift anorg allge chemie

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“…The X-ray crystal structure of a similar zincate anion confirmed the trigonal planar environment of the zinc atom, the counter-ion being a coordinated sodium cation. 75 In 1924 Hein et al 76 and many years later Gilman and Woods 77 prepared a zincate solution from diethylzinc and calcium metal. Kaufmann and co-workers 78 deduced from NMR spectroscopic investigations of such solutions a solvent-dependent equilibrium between the homoleptic compounds CaEt 2 and ZnEt 2 , the contact ion pair Ca 2+ ZnEt 4 2− with the intermediate Et-Ca(l-Et) 2 Zn-Et, and the solvent-separated ion pair with isolated ZnEt 4 2− anions.…”

Section: Iii2 Zincates and Cuprates Of The Heavy Alkaline-earth Metalsmentioning

confidence: 99%

Recent developments in the field of organic heterobimetallic compounds of the alkaline-earth metals

Westerhausen

2006

Dalton Trans.

119

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Heterobimetallic compounds of the alkaline-earth metals show a wide structural variety with strongly differing reactivity patterns. The combination of magnesium and alkali metal amides yields cyclic molecules with an extreme high reactivity which often are considered as "inverse crowns" with the metal atoms as coordination sites for Lewis bases. In other metallates of the alkaline-earth metals an activation of alkyl groups succeeds. In alkaline-earth metal zincates an inverse coordination of the type M(2)[(mu-R)(2)ZnR](2) is observed and the alkyl groups are in bridging positions between zinc and the s-block metals thus forming a very reactive M-C-Zn three-center-two-electron bond. Furthermore, the metals of the carbon group form alkaline-earth metal-silicon, -germanium and -tin bonds or, in the presence of very strong Lewis bases, even solvent-separated ion pairs. For electronegative substituents at tin an inverse coordination mode such as M[(mu-R)(2)SnR](2) is observed.

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“…The phenomenon was first discovered by Hein [54] in 1924. He found that a mixture of diethylzinc and ethyl sodium forms a solution which is not inferior to 0.1 N aqueous potassium chloride solution in electrical conductivity.…”

Section: Anodic Processesmentioning

confidence: 95%