coordination number

简明释义

配位数

英英释义

例句

1.For the compound sodium chloride, the coordination number 配位数 of sodium ions is six.

对于氯化钠化合物，钠离子的coordination number 配位数 为六。

2.In coordination chemistry, the coordination number 配位数 helps determine the geometry of the complex.

在配位化学中，coordination number 配位数 有助于确定配合物的几何形状。

3.Transition metals often exhibit a coordination number 配位数 of four or six in their complexes.

过渡金属的配合物通常表现出四或六的coordination number 配位数。

4.In a crystal lattice, the coordination number 配位数 indicates how many nearest neighbors surround an atom.

在晶体格子中，coordination number 配位数 表示一个原子周围有多少个最近邻原子。

5.The coordination number 配位数 can vary depending on the size and charge of the ions involved.

不同离子的大小和电荷会影响coordination number 配位数 的变化。

作文

The concept of coordination number is fundamental in the field of chemistry, particularly in coordination chemistry. It refers to the number of ligand atoms that are bonded to a central metal atom in a complex. Understanding the coordination number is essential for predicting the geometry and reactivity of metal complexes. For instance, a metal ion with a coordination number of six typically adopts an octahedral geometry, while a coordination number of four can lead to either tetrahedral or square planar arrangements, depending on the specific ligands involved.In coordination compounds, ligands are molecules or ions that donate electron pairs to the metal atom. The nature of these ligands, along with their steric and electronic properties, significantly influences the coordination number. For example, small ligands like water (H2O) can allow for higher coordination numbers, whereas larger ligands, such as phosphines, may limit the coordination number due to steric hindrance.The coordination number also plays a crucial role in determining the stability of metal complexes. Generally, complexes with higher coordination numbers tend to be more stable due to the increased number of bonds between the ligands and the metal center. However, this is not a strict rule, as various factors, including the metal's oxidation state and the type of ligands, can affect stability.Moreover, the concept of coordination number extends beyond simple coordination compounds. In biological systems, the coordination number is vital in understanding metalloenzymes and metalloproteins. For instance, hemoglobin, the protein responsible for oxygen transport in blood, features iron at its core, which has a coordination number of six. This allows hemoglobin to effectively bind oxygen and release it where needed in the body.In summary, the coordination number is a critical parameter in coordination chemistry that influences the structure, stability, and reactivity of metal complexes. By studying the coordination number and its implications, chemists can design new compounds with desired properties and functions. As research in this area continues to evolve, the importance of understanding the coordination number will remain paramount, especially in fields such as catalysis, materials science, and biochemistry. This understanding not only enhances our knowledge of chemical interactions but also paves the way for innovations in technology and medicine.

“配位数”这一概念在化学领域，尤其是配位化学中具有基础性的重要性。它指的是在一个配合物中，与中心金属原子相连的配体原子数量。理解“配位数”对于预测金属配合物的几何形状和反应性至关重要。例如，配位数为六的金属离子通常采用八面体几何结构，而配位数为四则可以根据特定配体的不同，形成四面体或平面正方形排列。在配位化合物中，配体是指向金属原子捐献电子对的分子或离子。这些配体的性质，以及它们的立体和电子特性，显著影响着“配位数”。例如，小配体如水（H2O）可以允许更高的配位数，而较大的配体，如磷烷，可能由于立体阻碍而限制配位数。“配位数”在决定金属配合物的稳定性方面也发挥着关键作用。一般来说，配位数较高的配合物由于配体与金属中心之间的键数增加，往往更为稳定。然而，这并不是一条严格的规则，因为包括金属的氧化态和配体类型在内的各种因素都会影响稳定性。此外，“配位数”的概念不仅限于简单的配位化合物。在生物系统中，配位数对于理解金属酶和金属蛋白至关重要。例如，负责血液中氧气运输的蛋白质血红蛋白，其核心含有铁，配位数为六。这使得血红蛋白能够有效地结合氧气，并在需要的地方释放。总之，“配位数”是配位化学中的一个关键参数，影响着金属配合物的结构、稳定性和反应性。通过研究“配位数”及其影响，化学家们可以设计出具有所需特性的新的化合物。随着该领域研究的不断发展，理解“配位数”的重要性将始终存在，特别是在催化、材料科学和生物化学等领域。这种理解不仅增强了我们对化学相互作用的认识，也为技术和医学创新铺平了道路。