Journal ArticleDOI
A stable compound containing a silicon-silicon triple bond.
TLDR
The reaction of 2,2,3,3-tetrabromo-1,1,4, 4,4-tetrakis[bis(trimethylsilyl)methyl]-1, 4-diisopropyltetrasilane with four equivalents of potassium graphite (KC8) in tetrahydrofuran produces 1,1-4,4-, which shows half the magnitude of the bond shortening of alkynes compared with thatAbstract:
The reaction of 2,2,3,3-tetrabromo-1,1,4,4-tetrakis[bis(trimethylsilyl)methyl]-1,4-diisopropyltetrasilane with four equivalents of potassium graphite (KC 8 ) in tetrahydrofuran produces 1,1,4,4-tetrakis[bis(trimethylsilyl)methyl]-1,4-diisopropyl-2-tetrasilyne, a stable compound with a silicon-silicon triple bond, which can be isolated as emerald green crystals stable up to 100°C in the absence of air. The SiSi triple-bond length (and its estimated standard deviation) is 2.0622(9) angstroms, which shows half the magnitude of the bond shortening of alkynes compared with that of alkenes. Unlike alkynes, the substituents at the SiSi group are not arranged in a linear fashion, but are trans-bent with a bond angle of 137.44(4)°.read more
Citations
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A Combined Charge and Energy Decomposition Scheme for Bond Analysis
TL;DR: The ETS-NOCV scheme offers a compact, qualitative, and quantitative picture of the chemical bond formation within one common theoretical framework and can be widely used for the description of different types of chemical bonds.
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Main-group elements as transition metals
TL;DR: The last quarter of the twentieth century and the beginning decade of the twenty-first witnessed spectacular discoveries in the chemistry of the heavier main-group elements, which led to new structural and bonding insights as well as a gradually increasing realization that the science more resembles that of transition-metal complexes than that of their lighter main- group congeners.
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Advances in the Synthesis of Organoborane Polymers for Optical, Electronic, and Sensory Applications
TL;DR: The past decade has witnessed renewed interest and numerous unexpected discoveries in the area of main group organometallic chemistry, and unusual bonding modes have been uncovered and new materials have been developed and new applications are being pursued.
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π-Bonding and the Lone Pair Effect in Multiple Bonds Involving Heavier Main Group Elements: Developments in the New Millennium
Roland Fischer,Philip P. Power +1 more
TL;DR: The key unifying feature of almost all molecules discussed in this review is that they are generally stabilized by the use of bulky substituents which block associative or various decomposition pathways.
Journal ArticleDOI
Stable Heavier Carbene Analogues
TL;DR: The early silylene research was concerned largely with comparing the chemistry of the dihalosilylenes with that of carbenes, so it might be difficult to isolate metallylenes as stable compounds under ambient conditions.
References
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Gallanes, Gallenes, Cyclogallenes, and Gallynes: Organometallic Chemistry about the Gallium−Gallium Bond
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Synthesis, Structure and Dehalogenation of the Disilene RClSi=SiClR [R = (tBu3Si)2MeSi]
TL;DR: In this paper, a planar SiClSi=SiClSi framework of disilene was analyzed and the formation mechanisms of which were discussed − the formation mechanism of which are discussed − is discussed.
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Mehrfachbindungen in der anorganischen Chemie
TL;DR: In this article, the erste and zweite Achterperiode is considered, and the Verhaltnisse werden fur die erste und zweit Achteriode beschrieben.
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Silicon−Silicon Triple Bonds: Do Substituents Make Disilynes Synthetically Accessible?
TL;DR: In this paper, the electronic and steric effects of electropositive silyl groups play an important role in making disilynes (RSi⋮SiR) an interesting synthetic target.