Über Silikone, LXXIV. Die Umsetzung von Bis‐trichlorsilyl‐dichlormethan und Tris‐trichlorsilyl‐chlormethan mit Silicium

Müller, Richard; Müller, Winfried

doi:10.1002/cber.19630961110

Cited by 28 publications

(3 citation statements)

References 7 publications

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“…A white crystalline solid was isolated and identified as C(SiCl 3 ) 4 . Other methods for the preparation of tetrakis(trichlorosilyl)methane include the reaction of bis(trichlorosilyl)dichloromethane or tris(trichlorosilyl)chloromethane with silicon tetrachloride on powdered silicon and copper at elevated temperatures, [4,5] the reaction of tris(trichlorosilyl)chloromethane with Si 2 Cl 6 and copper at 380 °C, [5] the reaction of bis(trichlorosilyl)dichloromethane with Si(Cu) in a fluid bed reactor at 300 °C, [6] the reaction of CCl 4 with silicon‐copper in a fluid bed reactor at 320 °C, [7] and the reaction of CBr 4 with SiCl 4 and magnesium in THF (equation 2) [8] . The molecular structure of tetrakis(trichlorosilyl)methane has been determined by gas phase electron diffraction [9] …”

Section: Neutral Trichlorosilyl Compounds Of P‐block Elementsmentioning

confidence: 99%

Trichlorosilyl Anions of p‐Block Elements – New Applications for Simple Molecules

Böhme

Riedel

2022

Eur J Inorg Chem

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Recently several trichlorosilyl anions of main group elements have been isolated and characterized. Since 2015 anions [E(SiCl 3 ) n ] À , which are stabilized solely by trichlorosilyl groups, have been prepared with E=B, C, Si, Ge, P, S. These compounds have long been overlooked due to their high reactivity. This disadvantage is also an advantage, since the high reactivity makes these anions useful as reagents in a number of transformations. Anions of this kind have been used so far in substitution reactions, as superacids, and weakly coordinating anions. This review summarizes present methods for the synthesis of these compounds. Possible applications and future developments are outlined.

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Section: Neutral Trichlorosilyl Compounds Of P‐block Elementsmentioning

confidence: 99%

Trichlorosilyl Anions of p‐Block Elements – New Applications for Simple Molecules

Böhme

Riedel

2022

Eur J Inorg Chem

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“…The first synthesis reported for tetrakis(trichlorosilyl)ethene (15) [26] started from dichlorobis(trichlorosilyl)methane, obtained from bis(trichlorosilyl)methane by chlorination. The prep aration of bis(trichlorosilyl)methane by the reac tion of trichlorom ethane with trichlorosilane and a tertiary amine base [27] can be notably improved by replacing the trichlorom ethane with chloromethyltrichlorosilane or dichlormethyltrichlorosilane.…”

Section: Preparation O F C-halogenated Trichlorosilylethenesmentioning

confidence: 99%

Synthesis and Molecular Structure of Silylated Ethenes and Acetylenes

Rüdinger

Beruda

Schmidbaur

1994

Zeitschrift Für Naturforschung B

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, By varying their stoichiometry these compounds can be used as single source feedstock gases for layers with tailor-made composition. In a new approach to the epitaxial deposition of silicon carbide, halogencontaining feedstock gases are expected to show improved properties owing to a greater reversi bility of the deposition process. W hereas polysilylalkanes halogenated at carbon are well rep resented in the literature [1 0 , 1 1 ], only limited information is available on the corresponding alkenes. The low thermal stability of polysilylated haloalkanes makes these compounds unsuitable for practical processes. The ethene analogues are expected to exhibit greater thermal stability and to be more amenable regarding storage and con * Reprint requests to Prof. Dr. H. Schmidbaur. tinuous handling. Although several sterically crowded polysilyl ethenes have been the subject of investigations of their molecular structure, dy namics and energy characteristics [12][13][14][15][16], the num ber of structurally characterized compounds is still small. Following work on silylalkanes, our more recent studies have therefore focused on silyl olefines. In the course of these investigations we have undertaken the X-ray structure determ i nations of bis(trichlorosilyl)acetylene and of the two most crowded trichlorosilylethenes, tris(trichlorosilyl)ethene and tetrakis(trichlorosilyl)-ethene.

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“…[19] Especially [P(SiCl 3 ) 2 ] À received considerable attention as synthon for the generation of phosphorus chemicals, that had previously only been available from white phosphorus (P 4 ). [20] Neutral molecules like [C(SiCl 3 ) 4 ], [21,22,23,24,25,26] [E(SiCl 3 ) 4 ] (E=Si, Ge), [27,28,29,30] and [N(SiCl 3 ) 3 ] [31,32,33] have been prepared earlier.…”

Section: Introductionmentioning

confidence: 99%

Unexpected Formation of the Highly Symmetric Borate Ion [B(SiCl₃)₄]⁻

Bochmann¹,

Böhme

Brendler

et al. 2021

Eur J Inorg Chem

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Disproportionation reactions of chlorosilane compounds in the presence of boron trichloride yield the compound H[B(SiCl 3 ) 4 ]. Spectroscopic analyses of the yellow-whitish solid with IR-, Raman-, and NMR-spectroscopy ( 29 Si, 11 B) show the presence of a highly symmetric anion containing boron, which is fourfold coordinated with silicon. Due to the high symmetry 1 J( 11 B, 29 Si) and even 1 J ( 10 B, 29 Si) couplings can be observed in the NMR spectra of the dissolved compound. The crystal structure analysis with a crystal obtained from toluene solution proves the existence of a highly symmetric borate anion, which is stabilized by four trichlorosilyl groups. The molecular structure consists of a para-protonated toluene cation and the weakly coordinating borate anion [B(SiCl 3 ) 4 ] À . Quantum chemical analysis of the tetrakis(trichlorosilyl)borate ion shows a negatively charged boron atom and the presence of polar SiÀ Cl and SiÀ B bonds. Highly reactive compounds [E(SiCl 3 ) n ] À which are stabilized solely by trichlorosilyl groups have been prepared with E=C, Si, Ge, P, S in recent years. The superacid H[B(SiCl 3 ) 4 ] represents a new member in this elusive compound family.

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Über Silikone, LXXIV. Die Umsetzung von Bis‐trichlorsilyl‐dichlormethan und Tris‐trichlorsilyl‐chlormethan mit Silicium

Cited by 28 publications

References 7 publications

Trichlorosilyl Anions of p‐Block Elements – New Applications for Simple Molecules

Trichlorosilyl Anions of p‐Block Elements – New Applications for Simple Molecules

Synthesis and Molecular Structure of Silylated Ethenes and Acetylenes

Unexpected Formation of the Highly Symmetric Borate Ion [B(SiCl₃)₄]⁻

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Über Silikone, LXXIV. Die Umsetzung von Bis‐trichlorsilyl‐dichlormethan und Tris‐trichlorsilyl‐chlormethan mit Silicium

Cited by 28 publications

References 7 publications

Trichlorosilyl Anions of p‐Block Elements – New Applications for Simple Molecules

Trichlorosilyl Anions of p‐Block Elements – New Applications for Simple Molecules

Synthesis and Molecular Structure of Silylated Ethenes and Acetylenes

Unexpected Formation of the Highly Symmetric Borate Ion [B(SiCl3)4]−

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Unexpected Formation of the Highly Symmetric Borate Ion [B(SiCl₃)₄]⁻