氨酸的二质子化:2-[二氧氧硫]乙氨 bis[六甲酸V) ]
Valentin Bockmair1, Andreas Klöck1, Dirk Hollenwäger1
1Department Chemie, Ludwig Maximilian University of Munich, Butenandtstrasse 5-13 (Haus D), D-81377 München, Germany.
Acta crystallographica. Section C, Structural chemistry
|November 20, 2024
概括
研究人员已经确定了氨酸的二质子化形式,这是一个重要的有机硫分子. 这项研究在超酸性系统中合成和结构性地表征了二质 taurine.
科学领域:
- 无机化学 无机化学 有机化学
- 生物化学 生物化学
- 结构化学 结构化学
背景情况:
- 氨酸是一种天然存在的有机硫化合物,对人类生物学至关重要.
- 氨酸的质子化形式越来越多地被认为具有生物学意义.
- 之前试图分离质子 taurine 使用了恶劣的条件 (HF/SbF5),只产生了单质子 taurine 的物种.
研究的目的:
- 合成和表征氨酸的二质子化形式.
- 为了在不那么恶劣的条件下研究质子 taurine 物种.
- 为了探索二质 taurine 的结构和光谱特性.
主要方法:
- 在二元超酸系统HF/AsF5.5.中合成二质突 taurine.
- 单晶X射线衍射分析.
- 低温振动光谱学和NMR光谱学.
主要成果:
- taurine 的二质子形式,2-[dihydroxy(oxo) sulfanyliumyl]ethanaminium bis[hexafluoridoarsenate(V) ],[H2O3SC2H4NH3][AsF6]2,已经成功合成.
- 该化合物结晶成无色针.
- 结构特征证实了 taurine 的二质子化状态.
结论:
- 这项研究成功地分离和表征了二质 taurine.
- 这些发现提供了关于 taurine 在超酸性环境中的行为的见解.
- 这项研究扩大了对质子化生物分子及其潜在生物作用的理解.
关键词:
核磁共振光谱法 (NMR) 是一种光谱法.氨基基硫酸氨基基硫酸晶体结构 晶体结构质子化 质子化 质子化这是一种超酸性.taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine taurine 是一种类型的氨基酸振动光谱学是一种振动光谱学.
相关概念视频
01:14Keto–Enol Tautomerism: Mechanism
5.2K
The keto and enol forms are known as tautomers and they constantly interconvert (or tautomerize) between the two forms under acid or base catalyzed conditions. Both the reactions involve the same steps—protonation and deprotonation— although in the reverse order.
5.2K
00:48¹H NMR of Labile Protons: Deuterium (²H) Substitution
876
This lesson illustrates the role of deuterium substitution in simplifying the NMR spectrum of compounds comprising labile protons. One method employed is the use of deuterium. Amongst the three isotopes of hydrogen, deuterium (2H) has a nucleus composed of one proton and one neutron. When the D2O solvent is added to a pure dry ethanol solution, its labile proton is substituted with deuterium.
876
02:08Titration of a Polyprotic Acid
95.8K
A polyprotic acid contains more than one ionizable hydrogen and undergoes a stepwise ionization process. If the acid dissociation constants of the ionizable protons differ sufficiently from each other, then the titration curve for such polyprotic acid generates a distinct equivalence point for each of its ionizable hydrogens. Therefore, titration of a diprotic acid results in the formation of two equivalence points, whereas the titration of a triprotic acid results in the formation of three...
95.8K
01:20¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
1.0K
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
1.0K
01:45Tail-anchoring of Proteins in the ER Membrane
3.1K
Tail-anchored, or TA, proteins are estimated to make up to 3-5% of membrane proteins found in the eukaryotic cell. Such proteins have a single transmembrane domain located approximately 30 amino acid residues upstream from the C-terminal end. As a result, the signal recognition particle (SRP) cannot guide a TA protein to the ER membrane for cotranslational insertion. Hence, they are integrated into the ER membrane post-translationally using their C-terminal end as the anchor. TA proteins...
3.1K
01:22Electrophilic Aromatic Substitution: Sulfonation of Benzene
5.8K
Sulfonation of benzene is a reaction wherein benzene is treated with fuming sulfuric acid at room temperature to produce benzenesulfonic acid. Fuming sulfuric acid is a mixture of sulfur trioxide and concentrated sulfuric acid.
5.8K