Synthesis, Structures, and Reactions of 1,2,3-Tris(diethylamino)-1,2,3,4-tetrakis(1,1,2-trimethylpropyl)cyclotetrasilanes

doi:10.1246/BCSJ.70.2749

Paper

Synthesis, Structures, and Reactions of 1,2,3-Tris(diethylamino)-1,2,3,4-tetrakis(1,1,2-trimethylpropyl)cyclotetrasilanes

Published Nov 15, 1997 · M. Unno, R. Tanaka, Toshie Kuribara

Bulletin of the Chemical Society of Japan

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Abstract

The reaction of dichloro(diethylamino)thexylsilane (thexyl = 1,1,2-trimethylpropyl) with lithium gave 1,2,3-tris(diethylamino)-1,2,3,4-tetrathexylcyclotetrasilane (2) as a mixture of four diastereomers (r-1,t-2,c-3,t-4-2, r-1,t-2,t-3,t-4-2, r-1,t-2,c-3,c-4-2, and r-1,c-2,t-3,t-4-2). The isomers were separated and identified by 1H, 13C, and 29Si NMR, IR, Mass, and UV spectroscopy. The structures of r-1,t-2,c-3,t-4-2, r-1,t-2,t-3,t-4-2, and r-1,t-2,c-3,c-4-2 were confirmed by X-ray crystallography. The Si–Si bond lengths are 2.391(1)—2.499(2) A for r-1,t-2,c-3,t-4-2, 2.389(2)—2.478(1) A for r-1,t-2,t-3,t-4-2, and 2.397(2)—2.485(2) A for r-1,t-2,c-3,t-4-2. In these molecules, there is a significant change in the structures of the Si4 frameworks; the dihedral angles were 18° for r-1,t-2,c-3,t-4-2, 34° for r-1,t-2,t-3,t-4-2, and 3° for r-1,t-2,c-3,t-4-2. The chlorodeamination or bromodeamination of 2 with HCl or HBr afforded 1,2,3-trichloro-1,2,3,4-tetrathexylcyclotetrasilane or 1,2,3-tribromo-1,2,3,4-tetrathe...

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1,2,3-tris(diethylamino)-1,2,3,4-tetrathexylcyclotetrasilane is a promising synthesis tool for preparing complex organic compounds with unique properties.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

Synthesis, Structures, and Reactions of 1,2,3-Tris(diethylamino)-1,2,3,4-tetrakis(1,1,2-trimethylpropyl)cyclotetrasilanes

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References

UV-Visible and NMR Spectroscopic Studies of Disilanylene 1,2-Dianions. Questions of Charge Delocalization of Silyl Anions

Disilanylene 1,2-dianions show strong evidence of charge delocalization of silyl anion, supporting the formation of dialkali metal 1,2-disila-1,2-acenaphtenediide.

Regioselective Synthesis of Polyfunctionalized Alkyltrisilanes and -tetrasilanes via Reductive Cross-Coupling Reaction of Aminoalkylsilyl Chlorides with Lithium

Lithium metal promotes highly selective cross-coupling reactions between aminodichloromonosilanes and aminochlorodisilanes, leading to the synthesis of symmetrical and unsymmetrical diamino- to pentaaminotrisilanes and te

Oxaoctasilahomocubane and dioxaoctasilabishomocubane: novel silicon ring systems

Novel silicon ring systems 9-oxaoctasilahomocubane and 5,10-dioxaoctasilabishomocubane were synthesized by photo-induced reaction of octasilacubane with dimethylsul

Hepta-tert-butylcyclotetrasilane: a highly crowded cyclotetrasilane

Hepta-tert-butylcyclotetrasilane is a highly crowded cyclotetrasilane with unusually long SiSi bonds and a low oxidation potential compared to other less crowded cyclotetrasilanes.

Synthesis, structures, and properties of novel aminodisilanes bearing bulky substituents: 1,2-bis(1,1,2-trimethylpropyl)-1,1,2,2-tetrakis(diethylamino) disilane and 1,2-di-tert-butyl-1,1,2,2-tetrakis(diethylamino) disilane

Novel aminodisilanes with bulky substituents were synthesized and characterized, showing promising UV spectra and oxidation potentials.

Citations

Synthesis and Crystal Structures of Silapericyclynes.

Silapericyclynes show absorption maxima in the range of 203-221 nm, with crystal structures varying depending on the substituents on silicon atoms.

Silapericyclyne, (Ph2SiC≡C)6: Spontaneous Conformational Resolution of Boat- and Chair-‘Exploded’ Cyclohexane

Silapericyclyne undergoes spontaneous conformational resolution into chair and boat conformations, rapidly interconverting in solution, and cannot be separately detected by 1H NMR at low temperatures.

Synthesis and Reactions of Hepta-t-Butylcyclotetragermane

Hepta-t-butylcyclotetragermane 1 can be synthesized from 1,2-dichloro-1,1,2,2-tetra-t-butyldigermane, and its thermal reaction produces two isomers of hexa-t-butylcycl

1,2,3-Triphenyl-1,2,3-trithexylcyclotrisilanes: Synthesis and Ring-Opening by Halogens

Ring-opening reactions with bromine lead to 1,3-dibromo-1,2,3-triphenyl-1,2,3-trithexyltrisilane, which is a promising intermediate for the synthesis of cyclotrisilanes.