Fe-Si-P結合とFe-P-Si結合の再結合は,隔離可能な中間物質であるフォスファシラフェラサイクロプロパンによって行われる
Masaaki Okazaki1, Takahiko Yoshitomi, Junpei Naito
1Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
Journal of the American Chemical Society
|December 26, 2008
まとめ
研究者らは,新種のフォスファシラフェラサイクルの化合物を,光化学的方法によって合成した. この鉄・シリコン・リン複合体は,ユニークな集団移動を経験し,有機金属化学の新たな経路を明らかにします.
科学分野:
- 有機金属化学 有機金属化学
- 無機化学 無機化学とは
- 材料科学 材料科学とは
背景:
- オルガノシリコンとオルガノリンリンガンドは,協調化学において極めて重要です.
- シリコンとリンを含む鉄複合体は,ユニークな反応性と構造的可能性を提供します.
研究 の 目的:
- 新種のリン酸塩フェラサイクルの複合体を合成し,特徴づけること.
- 鉄・シリコン・リン系システムの反応性および再配置経路を調査する.
主な方法:
- 前体鉄複合体の光化学放射線による照射.
- 製品のスペクトロスコーピカル特徴付け (NMR,X線結晶学)
- 集団移住を伴う反応機構の分析.
主要な成果:
- フォスファシラフェラサイクル [Cp*(CO) Fe{kappa(2) Si,P-SiMe(2) PPh(2) }の合成が成功しました.
- 穏やかな条件下で新しい鉄複合体 [Cp*(CO) (((2) FeP (((Ph) SiMe (((2) Ph) ] に変換する.
- 重要な変換メカニズムとして,連続的な1,2および1,3グループ移動の識別.
結論:
- この研究は,複雑なFeSiP化合物への新しい合成経路を示しています.
- 観察された集団移動は,有機金属のクラスターの動的行動に関する洞察を提供します.
- この研究は,シリコンとリンを含む鉄複合体の範囲を拡大する.
関連する概念動画
02:53Conservative Site-specific Recombination and Phase Variation
Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
The recognition sites for Cre recombinase called LoxP...
02:32Exon Recombination
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Exon shuffling follows “splice frame rules.” Each exon has three reading...
01:57Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
02:08Gene Conversion
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
02:02Cis-regulatory Sequences
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...