dative bond

简明释义

配价键

英英释义

例句

1.In organic chemistry, understanding the dative bond 配位键 can help explain the reactivity of certain compounds.

在有机化学中，理解配位键 dative bond 可以帮助解释某些化合物的反应性。

2.The formation of a dative bond 配位键 is crucial for the behavior of transition metals in catalysis.

形成配位键 dative bond 对于过渡金属在催化中的行为至关重要。

3.A dative bond 配位键 occurs when one atom provides both electrons for a covalent bond.

当一个原子为共价键提供一对电子时，就会发生配位键 dative bond。

4.In coordination chemistry, a dative bond 配位键 is formed when a ligand donates a pair of electrons to a metal ion.

在配位化学中，配位键 dative bond 是当配体向金属离子捐赠一对电子时形成的。

5.The dative bond 配位键 between ammonia and copper(II) ions stabilizes the complex.

氨与铜(II)离子之间的配位键 dative bond 稳定了该络合物。

作文

In the field of chemistry, understanding the various types of chemical bonds is crucial for grasping how molecules interact and form. One such bond that plays a significant role in coordination chemistry is the dative bond. A dative bond is a type of covalent bond where both electrons shared in the bond originate from the same atom. This unique characteristic distinguishes it from typical covalent bonds, where each atom contributes one electron to the bond. The concept of a dative bond is essential when discussing complex ions and coordination compounds, where a central metal atom or ion is surrounded by molecules or anions known as ligands.Ligands can be classified as either neutral molecules or negatively charged ions, and they donate a pair of electrons to the metal center, forming a dative bond. For instance, in the case of ammonia (NH3) acting as a ligand, it donates its lone pair of electrons to a metal ion like copper (Cu²⁺). As a result, a dative bond is formed between the nitrogen atom of ammonia and the copper ion, contributing to the stability of the resulting complex.The significance of dative bonds extends beyond just the formation of complexes; they are pivotal in determining the properties and reactivity of the resulting compounds. For example, the presence of dative bonds can influence the color, solubility, and overall stability of coordination compounds. This is particularly evident in transition metal complexes, which often exhibit vibrant colors due to the electronic transitions facilitated by the dative bonds formed with various ligands.Moreover, dative bonds are also present in biological systems, playing a vital role in the structure and function of biomolecules. For instance, in hemoglobin, the iron ion at the center of the heme group forms dative bonds with oxygen molecules, allowing for efficient oxygen transport in the bloodstream. This biological significance highlights the importance of understanding dative bonds not only in inorganic chemistry but also in biochemistry and medicine.In conclusion, the dative bond is a fundamental concept in chemistry that facilitates the understanding of molecular interactions, particularly in coordination chemistry. Its unique characteristics, where one atom donates both electrons to form a bond, set it apart from traditional covalent bonds. The implications of dative bonds are vast, influencing the properties of complex ions, their reactivity, and their role in biological systems. As students and researchers continue to explore the intricacies of chemical bonding, the dative bond remains a key topic of interest, illustrating the beauty and complexity of molecular chemistry.

在化学领域，理解各种类型的化学键对于掌握分子如何相互作用和形成至关重要。其中一个在配位化学中起着重要作用的键是dative bond。dative bond是一种共价键，其中共享的两个电子均来自同一原子。这一独特特性使其与典型的共价键区别开来，后者中每个原子贡献一个电子。dative bond的概念在讨论复杂离子和配位化合物时至关重要，其中一个中心金属原子或离子被称为配体的分子或阴离子包围。配体可以分为中性分子或带负电的离子，它们将一对电子捐赠给金属中心，从而形成dative bond。例如，在氨气（NH3）作为配体的情况下，它将其孤对电子捐赠给铜离子（Cu²⁺）。因此，氮原子与铜离子之间形成了dative bond，这有助于所形成复合物的稳定性。dative bond的重要性不仅仅体现在复合物的形成上；它们在确定所形成化合物的性质和反应性方面也起着关键作用。例如，dative bond的存在可以影响配位化合物的颜色、溶解度和整体稳定性。这在过渡金属配合物中尤为明显，这些配合物由于由不同配体形成的dative bond促进的电子跃迁而通常表现出鲜艳的颜色。此外，dative bond在生物系统中也存在，发挥着生物分子结构和功能的重要作用。例如，在血红蛋白中，血红素组中心的铁离子与氧分子形成dative bond，使得在血液中高效运输氧气成为可能。这一生物学意义突显了理解dative bond在无机化学、生物化学和医学中的重要性。总之，dative bond是化学中的一个基本概念，有助于理解分子相互作用，特别是在配位化学中。其独特特性，即一个原子捐赠两个电子以形成键，使其与传统的共价键区别开来。dative bond的影响范围广泛，影响复杂离子的性质、反应性以及它们在生物系统中的作用。随着学生和研究人员继续探索化学键的复杂性，dative bond仍然是一个重要的研究主题，展示了分子化学的美丽与复杂性。