让InChI公平和可持续,同时转向无机物质
Gerd Blanke1, Jan Brammer2, Djordje Baljozovic2
1StructurePendium GmbH, Essen, Germany. gerd.blanke@structurependium.com.
Faraday discussions
|October 2, 2024
概括
国际化学标识符 (InChI) 标准已通过改进的文档和错误修正来实现现代化. 提出了新的程序,以准确地表示无机化合物,解决目前的局限性.
科学领域:
- 化学信息学 化学信息学
- 计算化学是一种计算化学.
- 数据标准化数据标准化
背景情况:
- 国际化学标识符 (InChI) 对于化学信息交换和互联网规模结构搜索至关重要.
- 在此之前,InChI算法的内部运作是未经记录的,使其成为一个"黑子".
- 现有的InChI表示对于分子无机化合物来说是不够的,特别是对于金属-联体键.
研究的目的:
- 为了记录和改进InChI算法的代码库.
- 在InChI标准中增强分子无机化合物的表现.
- 提高透明度,促进社区对InChI发展的贡献.
主要方法:
- 对InChI代码库 v1.07 版本的分析和文档.
- 修复了3000多个错误和安全问题,其中包括近60个来自Google OSS-Fuzz.
- 开发用于表示无机化合物的新例程,重点是金属-连接体键.
主要成果:
- 通过广泛修复错误,在代码稳定性和安全性方面取得了显著的改进.
- 通过代码分析,文档和迁移到GitHub来提高透明度.
- 提出了新的方法,使分子无机化合物的有意义的InChI表示成为可能.
结论:
- 现代化的InChI代码库更强大,更安全,更透明.
- 提出的程序为长期存在的难题提供解决方案,即代表无机化合物.
- 这些进展将提高InChI对无机化学研究和数据管理的实用性.
相关概念视频
Gravimetry: Inorganic And Organic Precipitating Agents
1.2K
In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...
1.2K
Sample Preparation for Analysis: Advanced Techniques
302
Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
302
Extraction: Advanced Methods
431
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
431
Precipitation of Ions
27.8K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
27.8K
Indicators
48.3K
Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are...
48.3K
Leveling Effect and Non-Aqueous Acid-Base Solutions
8.1K
This lesson defines the leveling effect in acidic and basic solutions and its role in aqueous and non-aqueous solutions. It is essential to understand the competing nature of various species in a chemical system.
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
8.1K


