IB CCEA Chemistry: Coordination Chemistry Key Points | IB CCEA 化学：配位化学 考点精讲

📚 IB CCEA Chemistry: Coordination Chemistry Key Points | IB CCEA 化学：配位化学 考点精讲

Welcome to this focused revision guide on coordination chemistry, designed for both IB and CCEA A-Level Chemistry students. This article distils the essential concepts, definitions, and problem-solving strategies you need to master this challenging yet fascinating topic.

欢迎阅读这篇专为 IB 和 CCEA A-Level 化学学生编写的配位化学考点精讲。本文提炼了需要掌握的核心概念、定义和解题策略，帮助你攻克这个充满挑战又引人入胜的主题。

1. What is a Coordination Complex? | 什么是配位化合物？

A coordination complex (or coordination compound) consists of a central metal ion or atom bonded to a set of surrounding molecules or ions called ligands. The bond between the metal and ligand is a coordinate covalent bond (dative bond), where the ligand donates a lone pair of electrons to the metal ion. The central metal ion is typically a transition metal with vacant d-orbitals that can accept electron pairs.

配位化合物（或称配合物）由中心金属离子或原子与周围一组被称作配体的分子或离子键合而成。金属与配体之间的键为配位共价键（配位键），配体提供孤对电子给金属离子。中心金属离子通常是具有空 d 轨道的过渡金属，可接受电子对。

Example: [Cu(H₂O)₆]²⁺ – hexaaquacopper(II) ion, where six water molecules act as ligands donating lone pairs to Cu²⁺.

示例：[Cu(H₂O)₆]²⁺ – 六水合铜(II)离子，其中六个水分子作为配体向 Cu²⁺ 提供孤对电子。

2. Types of Ligands | 配体的类型

Ligands are classified based on the number of donor atoms they use to bind to the central metal ion. Monodentate ligands use one donor atom (e.g., H₂O, NH₃, Cl⁻, CN⁻). Bidentate ligands use two donor atoms (e.g.,

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