![The Synthesis of [Sn10SiSiMe334]2- Using a Metastable SnI Halide Solution Synthesized via a Co-condensation Technique](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F54498.jpg&w=3840&q=50)
アルキル化鉄硫黄有機金属クラスタの計算式記述
Richard J Jodts1, M Wittkop2, Madeline B Ho1
1Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.
Journal of the American Chemical Society
|June 12, 2023
まとめ
S-アデノシルメチオニンの酵素は,水素原子抽出に不可欠です. この研究は,高度な計算方法を使用して,鉄-炭素結合を持つ主要な有機金属中間物質 (Ω) を確認した.
科学分野:
- 生物化学
- バイオ有機化学
- コンピュータ化学
背景:
- ラジカルS-アデノシルメチオニン (SAM) 酵素スーパーファミリーは,重要な水素原子抽離反応を触媒化する.
- これらの酵素は,SAMから5'-デオキシアデノシル基 (5'-dAdo•) を生成し,基板と相互作用する.
- 実験データは,Fe-C5'-アデノシル結合を持つ有機金属中間物質 (Ω) を示唆している.
研究 の 目的:
- 有機金属中間物質 Ω の性質を理論的に調査する.
- このような中間物質を記述するための計算方法を開発し,検証する.
主な方法:
- 2つの構成の破られた対称性 DFT (2C-DFT) のアプローチが開発されました.
- 2C- DFTは,多構成のCASSCF計算と実験的スペクトロスコピーデータに対して検証された.
- この方法は,中間 ΩにおけるFe-C5'-アデノシル結合を分析するために適用された.
主要な成果:
- 2C-DFT法では,鉄硫黄群に結合したアルキル群の超微細結合定数とgテンサを正確に記述します.
- 2C-DFT計算とモデルFe-CH3複合体の実験データとの間には優れた一致が見られた.
- この研究は,直接のFe-C5'結合を持つ中間 Ωの有機金属性質を確認した.
結論:
- 開発された2C-DFT方法は,鉄硫黄クラスターおよび関連する有機金属中間物質の研究のための信頼できるツールです.
- この発見は,SAMの酵素メカニズムにおける提案された有機金属中間物質 Ωの存在と構造を検証するものである.
- この研究は,ラジカルなSAM酵素によって触媒される重要な生物学的反応のメカニズムに関する重要な洞察を提供します.
関連する概念動画
01:23Properties of Organometallic Compounds
1.1K
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
1.1K
02:58Crystal Field Theory - Octahedral Complexes
26.9K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.9K
03:02Colors and Magnetism
12.0K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.0K
02:42Valence Bond Theory
8.8K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.8K
02:51Metal-Ligand Bonds
21.1K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
21.1K
02:17Structure and Nomenclature of Thiols and Sulfides
4.9K
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,...
4.9K