関連する実験動画
Updated: Jun 10, 2026

09:45
Modification and Functionalization of the Guanidine Group by Tailor-made Precursors
Published on: April 27, 2017
安定したダイアルキルシラケテネミンの合成,構造,結合
Takashi Abe1, Takeaki Iwamoto, Chizuko Kabuto
1Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan.
Journal of the American Chemical Society
|March 30, 2006
まとめ
研究者らは,ダイアキルシリレンとイソシアニドを用いて安定したシラケテニミンを合成した. 分子構造はアレン性であることが判明し,結合は置換物によって影響され,合成された化合物の明確な色変化につながった.
科学分野:
- オーガノシリコン化学 化学
- アイソシアン化物の化学的性質
- スペクトル顕微鏡検査です.
背景:
- ダイアルキルシリレンとは,反応性のある中間物質である.
- シラケテニミンは,潜在的な応用があるシリコン-窒素化合物です.
研究 の 目的:
- 新しい (N-アリル) -および (N-アルキル) ダイアルキルシラキテニミンを合成し,特徴づけること.
- これらの化合物の構造的および電子的性質を調査する.
主な方法:
- ダイアキルシリレンとイソシアニドの反応.
- 単結晶X線分析. 単結晶X線分析. 単結晶X線分析. 単結晶X線分析.
- 紫外線-紫外線スペクトロスコーピー. 紫外線-紫外線スペクトロスコーピー. 紫外線-紫外線スペクトロスコーピー. 紫外線-紫外線スペクトロスコーピー.
主要な成果:
- 安定した青と赤の結晶シラケテニミン (2aと2b) を合成した.
- X線解析により,アレン性分子構造が明らかになった.
- 顕微鏡分析は,N-アリル誘導体 (2a) のpi(Si=C) -->pi*(C=N) 帯における有意な赤色偏移を示した.
結論:
- シラケテニミンの構造は,シリコンと窒素の置換物によって影響を受けます.
- 観測されたスペクトル差は,pi*(C=N) とpi*(N-aryl) 軌道間の電子相互作用に起因する.
関連する概念動画
Organic Compounds
All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
Peptide Bonds
A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
Carboxylic Acid Derivatives: Overview
Carboxylic acid derivatives are formed by replacing the hydroxyl group of carboxylic acids with a different functional group. The most common carboxylic acid derivatives are:
Structures of Carboxylic Acid Derivatives
Structure of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the unhybridized p...
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the unhybridized p...
Acidity and Basicity of Carboxylic Acid Derivatives
Carboxylic acids are the strongest among organic acids, as they readily lose the hydroxyl proton to form a resonance-stabilized carboxylate ion. In comparison, the acid derivatives lack acidic hydrogens directly attached to a functional group. In these compounds, the acidic nature arises from their ability to lose α hydrogens, making them weakly acidic.
The relative acidic strength of the derivatives can be explained based on the extent of resonance stabilization of the conjugate base. The...
The relative acidic strength of the derivatives can be explained based on the extent of resonance stabilization of the conjugate base. The...
Structure of Amines
The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’ carbon–carbon bond (154 pm). These aspects are illustrated in Figure...

