Silicon‐Containing Spacers for the Synthesis of Tin‐Containing Multidentate Lewis Acids

Altmann, Reiner; Gausset, Olivier; Hummeltenberg, Reinhard; Jurkschat, Klaus; Kühn, Silke; Schürmann, Markus; Zobel, Bernhard

doi:10.1002/9783527619917.ch66

Cited by 2 publications

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“…There have been a few examples of larger [ n . n ]ferrocenophanes in the literature − including a tin-containing [5.5]ferrocenophane with two (Me 2 SiCH 2 ) 2 SnMe 2 bridges isolated by Jurkschat and co-workers in a 60% yield. We report herein, the isolation, in modest yield, of the first example of a symmetrical tin-containing [3.3]ferrocenophane, its characterization by NMR spectroscopy and identification by mass spectrometry, and detail the electronic properties investigated by UV–vis spectroscopy and cyclic voltammetry.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Spectral Electrochemical Properties of a Symmetrical Tin-Bridged [3.3]Ferrocenophane

et al. 2013

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Section: Introductionmentioning

confidence: 99%

Synthesis and Spectral Electrochemical Properties of a Symmetrical Tin-Bridged [3.3]Ferrocenophane

et al. 2013

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Heavy Grignard Reagents: Challenges and Possibilities of Aryl Alkaline Earth Metal Compounds

Westerhausen

Gärtner

Fischer

et al. 2007

Chemistry A European J

164

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Compounds of the type aryl--M--X, with M=Ca, Sr, Ba and X as any kind of ligand (such as halide, phosphanide, amide, aryl), are presented. The low reactivity of the heavy alkaline earth metals calcium, strontium, and barium enforces an activation prior to use for the direct synthesis. The insertion of these metals into C--I bonds of aryl iodides (direct synthesis) yields aryl metal iodides and has to be performed at low temperatures and in THF. Aryl alkaline-earth-metal compounds show some characteristics: 1) the ease of ether cleavage enforces low reaction temperatures, 2) for Sr and Ba the Schlenk equilibrium is shifted towards homoleptic MI2 and MPh2, 3) high solubility of diaryl alkaline-earth-metal derivatives in THF even at low temperatures initiated quantum chemical investigations on the aggregation behavior, and 4) a strong low field shift of the 13C resonances of the ipso carbon atoms in NMR spectra was observed. First results from quantum chemical calculations on diaryl dicalcium(I) suggest a long Ca--Ca bond with a considerable Ca--Ca bond dissociation energy. Initial results on a selection of applications such as metallation, metathesis, and addition reactions of aryl calcium compounds are presented as well.

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Silicon‐Containing Spacers for the Synthesis of Tin‐Containing Multidentate Lewis Acids

Cited by 2 publications

References 10 publications

Synthesis and Spectral Electrochemical Properties of a Symmetrical Tin-Bridged [3.3]Ferrocenophane

Synthesis and Spectral Electrochemical Properties of a Symmetrical Tin-Bridged [3.3]Ferrocenophane

Heavy Grignard Reagents: Challenges and Possibilities of Aryl Alkaline Earth Metal Compounds

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