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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.

Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis

Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis

Overview
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.

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.

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Related Experiment Video

Updated: Mar 26, 2026

Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids

Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids

Published on: August 10, 2016

Rapid Preparation of Silsesquioxane-Based Ionic Liquids.

Liguo Li¹, Hongzhi Liu^2,3

¹Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P.R. China.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|February 12, 2016

Summary

New hybrid ionic liquids (ILs) using cage silsesquioxane (SQ) were synthesized. These materials self-assemble into unique yolk-shell structures, showing promise for advanced applications.

Keywords:

ionic liquids self-assembly silsesquioxane thiol-ene reaction vesicles

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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Area of Science:

Materials Science
Organic Chemistry
Nanotechnology

Background:

Hybrid materials combining ionic liquids and silsesquioxanes offer unique properties.
Cage silsesquioxanes provide a rigid, well-defined nanostructure.
Ionic liquids are versatile solvents and building blocks.

Purpose of the Study:

To synthesize novel hybrid ionic liquids incorporating cage silsesquioxane structures.
To investigate the self-assembly behavior and structural characteristics of these new materials.
To evaluate the thermal properties of the synthesized hybrid ionic liquids.

Main Methods:

Photochemical thiol-ene reaction between octa(mercaptopropyl)silsesquioxane and allyl-functionalized imidazolium salts.
Synthesis of three distinct hybrid ionic liquids with varying counter anions (Br-, BF4-, PF6-).
Characterization of thermal properties, including glass transition temperatures and thermal stability.

Main Results:

Rapid, high-yield synthesis of three new cage silsesquioxane-based ionic liquids.
The hybrid ionic liquids exhibit low glass transition temperatures and good thermal stability.
Self-assembly into well-defined vesicles with distinct yolk-shell architectures was observed.

Conclusions:

The successful synthesis of novel SQ-ILs demonstrates the utility of the thiol-ene reaction.
The amphiphilic nature of these hybrid ILs drives the formation of yolk-shell vesicles.
These materials present potential for applications requiring self-assembling nanostructures.