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Preparation and Reactions of Sulfides

Preparation and Reactions of Sulfides

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.

Preparation and Reactions of Thiols

Preparation and Reactions of Thiols

Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.

Structure and Nomenclature of Thiols and Sulfides

Structure and Nomenclature of Thiols and Sulfides

Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry,...

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Oligosilanylated Antimony Compounds.

Rainer Zitz¹, Karl Gatterer¹, Crispin R W Reinhold²

¹Institut für Anorganische Chemie and Institut für Physikalische und Theoretische Chemie, Technische Universität Graz , Stremayrgasse 9, 8010 Graz, Austria.

Organometallics

|May 5, 2015

Summary

This summary is machine-generated.

Researchers synthesized novel oligosilanylated antimony compounds using magnesium oligosilanides. The study explored the formation of cyclic disilylated halostibines and distibines, offering insights into their chemical properties through computational analysis.

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Area of Science:

Organometallic Chemistry
Inorganic Chemistry
Materials Science

Background:

Oligosilanyl anions are versatile precursors in inorganic synthesis.
Antimony halides serve as key building blocks for novel antimony compounds.
Understanding the reactivity and properties of silicon-antimony bonds is crucial for developing new materials.

Purpose of the Study:

To synthesize and characterize novel oligosilanylated antimony compounds.
To investigate the reaction pathways leading to cyclic disilylated halostibines and distibines.
To elucidate the structural and electronic properties of these compounds using computational methods.

Main Methods:

Reaction of magnesium oligosilanides with antimony trichloride (SbCl3).
Reductive coupling of disilylated halostibines using potassium graphite (C8K).
Density functional theory (DFT) calculations for bond energies, inversion barriers, and conformational analysis.

Main Results:

Successfully synthesized various oligosilanylated antimony compounds.
Observed the formation of both cyclic disilylated halostibines and distibines.
Demonstrated the controlled synthesis of distibines via reductive coupling.
Computational studies provided detailed insights into Sb-Sb bond strengths and molecular geometries.

Conclusions:

Magnesium oligosilanides are effective reagents for preparing silicon-antimony compounds.
The reaction conditions influence the formation of cyclic halostibines versus distibines.
Computational data correlate well with experimental observations, aiding in property understanding.