NH,Oで置換されたダイカルベンの構成要素を橋渡しする分子正方形の段階的な形成
Fabian M Conrady1, Roland Fröhlich, Christian Schulte to Brinke
1Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany.
Journal of the American Chemical Society
|July 7, 2011
まとめ
研究者らは,イリジウム複合体と二酸化イソシアニドリガンドを使用して,新しい分子正方形を組み立てました. リガンドの脱保護により,ダイカルベンの橋渡しされた正方形が形成され,複雑な分子構造への新しい経路が示されました.
科学分野:
- 協調化化学について
- 超分子化学 超分子化学
- 有機金属化学 有機金属化学
背景:
- 金属有機正方形は,触媒と材料科学の応用を持つ多用途の超分子構造です.
- ステップウィズアセンブリは,複雑なアーキテクチャの形成に対する制御を提供します.
- イリジウム複合体は,協調化合物の貴重な構成要素である.
研究 の 目的:
- 小説 [Ir(Cp*) Cl] の段階的な合成を開発するために,角の分子正方形.
- 分子正方形構造内のディカルベン結合体の形成を調査する.
- 複雑な有機金属製のフレームワークを構築するための新しい方法を探求する.
主な方法:
- β,β'-bis(triisopropylsiloxy) phenyl-1,4-diisocyanideと [Ir(Cp*) Cl(2) ](2) を利用した段階的な組み立て.
- テトラキス (((ダイゾシアン化物)) ブリッジされた分子正方形の合成, [Ir (((Cp*) Cl (((3)) ] (((4) (((BF ((4)) ((4) [5] (((BF ((4)))) ((4)).
- HCl/i-PrOHとのO-Si (i-Pr) (i-Pr) (3) 結合の裂け方により,分子内循環が誘発される.
主要な成果:
- [Ir(Cp*) Cl]の角化分子正方形の段階的組み立てが成功しました.
- 分子内攻撃によって,ディカルベン橋渡し分子正方形, [6](Cl) ((4) の形成.
- 機能化された有機金属正方形への合成経路の実証.
結論:
- この研究は,ダイカルベンのリンク器を用いた分子正方形の構築のための新しい方法を提示しています.
- 開発された戦略は,複雑なイリジウムベースの超分子構造の制御された組み立てを可能にします.
- この研究は,機能的な有機金属材料の設計と合成のためのツールキットを拡張します.
関連する概念動画
Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry
Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
β-Dicarbonyl Compounds via Crossed Claisen Condensations
Crossed Claisen condensations are base-promoted reactions between two different ester molecules producing β-dicarbonyl compounds. The reaction involving esters, with both containing α hydrogen, results in a mixture of four different products that are difficult to isolate. This reduces the synthetic utility of the reaction.
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
Diels–Alder Reaction Forming Cyclic Products: Stereochemistry
The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.
π Molecular Orbitals of 1,3-Butadiene
Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
Newman Projections
Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as conformers.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as conformers.


