選択されたヒドロキシメチルおよびスルファニルメチラリル誘導体の結晶構造
Piotr Kuś1, Joachim Kusz2, Maria Książek2
1Institute of Chemistry, University of Silesia, 9 Szkolna Street, 40-006 Katowice, Poland.
Acta crystallographica. Section C, Structural chemistry
|August 26, 2025
まとめ
この研究では,ヒドロキシメチルまたはスルファニルメチル基を持つ8つの芳香化合物を調査した. 結晶構造における分子パッキングと分子間相互作用が分析され,構造と性質の関係に関する洞察が明らかになった.
科学分野:
- クリスタルグラフィー
- 有機化学
- 材料科学
背景:
- 機能群を持つ芳香化合物は様々な化学用途の構成要素である.
- 材料の性質を予測するには 結晶構造を理解することが重要です
- 分子包装に対するヘテロ原子置換 (O対S) の影響は,活発な研究分野である.
研究 の 目的:
- ナフタレンとベンゼン誘導体の結晶構造を分析する.
- 分子パッキングと相互作用に対する機能的グループ位置づけの影響を調査する.
- 機能的グループで酸素を硫黄に置き換える際の構造変化を比較する.
主な方法:
- 単一結晶のX線微分法で3次元構造を決定した.
- 包装モチーフを理解するために分子間距離と角度を分析する.
- 異なる機能群の配置とヘテロ原子を持つ結晶構造の比較
主要な成果:
- ポジショナルの同位体には 明確な結晶包装の配置がありました
- 機能群における酸素と硫黄の交換は,分子相互作用と単位細胞のパラメータに大きな変化をもたらした.
- 隣接する機能群の間の分子内水素結合は観察されなかった.
結論:
- ハイドロキシメチル/スルファニルメチルの配列は,結晶包みと分子間力を決定的に影響する.
- 硫黄を含む類型は,酸素の類型と比べて異なる分子間相互作用を示します.
- この発見は オーガニック素材を 設計するための 基礎となるものです
さらに関連する動画
関連する概念動画
01:28Structures of Carboxylic Acid Derivatives
2.9K
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...
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...
2.9K
02:26Preparation and Reactions of Sulfides
5.1K
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.
5.1K
02:17Structure and Nomenclature of Thiols and Sulfides
5.0K
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,...
5.0K
01:18Aromatic Hydrocarbon Anions: Structural Overview
2.9K
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...
Due to the absence of continuous...
2.9K
02:30Chirality at Nitrogen, Phosphorus, and Sulfur
5.9K
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...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
5.9K
01:30Nucleophilic Aromatic Substitution: Addition–Elimination (SNAr)
4.0K
Nucleophilic substitution in aromatic compounds is feasible in substrates bearing strong electron-withdrawing substituents positioned ortho or para to the leaving group. The reaction proceeds via two steps: the addition of the nucleophile and the elimination of the leaving group.
The reaction begins with an attack of the nucleophile on the carbon that holds the leaving group. This results in the delocalization of the π electrons over the ring carbons. The resonance interaction between...
The reaction begins with an attack of the nucleophile on the carbon that holds the leaving group. This results in the delocalization of the π electrons over the ring carbons. The resonance interaction between...
4.0K