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関連する概念動画

Preparation and Reactions of Sulfides02:26

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.
Sulfur Assimilation01:20

Sulfur Assimilation

Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to become...
Structure and Nomenclature of Thiols and Sulfides02:17

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, similar...
Exceptions to the Octet Rule02:55

Exceptions to the Octet Rule

Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
VSEPR Theory and the Basic Shapes02:52

VSEPR Theory and the Basic Shapes

Overview of VSEPR Theory

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関連する実験動画

Updated: May 31, 2026

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
12:30

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

Published on: April 9, 2018

硫黄で置換された四面体.

Tatsumi Ochiai1, Masaaki Nakamoto, Yusuke Inagaki

  • 1Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.

Journal of the American Chemical Society
|July 7, 2011
PubMed
まとめ

研究者らは,新しい硫黄置換テトラヘドランとフェニルシルフォニルテトラヘドランを合成した. UV-VISスペクトルは,フェニルスルフォニル化合物とは異なり,硫黄誘導体における電子相互作用を明らかにし,それぞれの異なる熱分解経路が観察されました.

科学分野:

  • 有機金属化学 有機金属化学
  • 合成化学 合成化学とは
  • スペクトロスコーピーは,スペクトロスコーピーを用います.

背景:

  • テトラヘッドランは,ストレングされた多面体炭化水素である.
  • 硫黄の置換は,ユニークな電子と反応性特性を提供します.
  • ストレートなシステムにおける構造-性質の関係を理解することは極めて重要です.

研究 の 目的:

  • 新しい硫黄置換テトラヘドラン誘導体を合成するために.
  • これらの化合物の内部における電子相互作用を,スペクトロスコーピーを用いて調査する.
  • テトラヘッドランの誘導体の熱反応性と分解経路を調査する.

主な方法:

  • トリス ((トリメチルシリル) テトラヘドラニルリチウムの合成と,様々なダイアリル硫化物との反応.
  • 核磁共振 (NMR) スペクトロスコピーとX線結晶学を用いた特徴化.
  • 電子相互作用を検知するために,UV-VIS吸収スペクトロスコーピーを用いる.
  • 分解産物を決定するための熱反応の研究.

主要な成果:

  • 安定した硫黄置換テトラヘドラン (2-4) とフェニルシルフォニルテトラヘドラン (5) の合成が成功しました.

さらに関連する動画

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
08:50

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Published on: November 28, 2017

Synthesis of Terpolymers at Mild Temperatures Using Dynamic Sulfur Bonds in Poly(S-Divinylbenzene)
09:16

Synthesis of Terpolymers at Mild Temperatures Using Dynamic Sulfur Bonds in Poly(S-Divinylbenzene)

Published on: May 20, 2019

関連する実験動画

Last Updated: May 31, 2026

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
12:30

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

Published on: April 9, 2018

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
08:50

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Published on: November 28, 2017

Synthesis of Terpolymers at Mild Temperatures Using Dynamic Sulfur Bonds in Poly(S-Divinylbenzene)
09:16

Synthesis of Terpolymers at Mild Temperatures Using Dynamic Sulfur Bonds in Poly(S-Divinylbenzene)

Published on: May 20, 2019

  • UV-VISスペクトルは,2〜4の誘導体におけるテトラヘッドランコアと硫黄単一のペアの間のσ-π相互作用を示した.
  • フェニルスルフォニルテトラヘドランではそのような電子相互作用は観察されなかった (5).
  • テトラヘドラン誘導体2は加熱すると2つのアセチレン分子に分裂する.
  • フェニルスルフォニルテトラヘドラン (5) が分解され,サイクロブタディエネを形成する.

    • 結論:

    • テトラヘドールにおける硫黄の置換は,コア構造との重要な電子相互作用につながる可能性があります.
    • 硫黄置換剤の性質 (例えば,フェニルシルフォニル群) は,これらの電子相互作用に影響を与えます.
    • 硫黄置換テトラヘドランとフェニル硫黄ニルテトラヘドランは,異なる熱分解機構を示し,機能化の反応性への影響を強調しています.