Bonding In Coordination Compounds
Chapter Name : Coordination Compounds |
Sub Topic Code : 102_12_09_05_02 |
Topic Name : Bonding In Coordination Compounds |
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Sub Topic Name : Magnetic Properties Of Coordination Compounds |
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Introduction
Coordination complex or metal complex, consists of an atom or ion (usually metallic), and a surrounding array of bound molecules or anions, that are in turn known as ligands or complexing agents.
Pre-Requisites:
Coordination Compounds
Activity:
Nickel tetracarbonyl.
Real Life Question:
What is Valence bond (VB) theory?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Valence bond (VB) theory | Valence bond (VB) theory is one of two basic theories, along with molecular orbital (MO) theory, that were developed to use the methods of quantum mechanics to explain chemical bonding. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Ligand field theory | Ligand field theory (LFT) describes the bonding, orbital arrangement, and other characteristics of coordination complexes. |
Real life uses :
Study of organometals.
Places to visit :
Pharmacy.
Practical examples around us
| Examples | Explainations |
|---|---|
| Nickel tetracarbonyl | It is an intermediate in the Mond process for the purification of nickel and a reagent in organometallic chemistry. |
What you learn in Theory:
Singular electrons have a spin, denoted by the quantum number ms as + (1/2) or – (1/2). This spin is negated when the electron is paired with another, but creates a slight magnetic field when the electron is unpaired.
What you learn in Practice:
The electron configuration of the transition metals (d-block) changes when in a compound. This is due to the repulsive forces between electrons in the ligands and electrons in the compound. Depending on the strength of the ligand, the compound may become paramagnetic or diamagnetic.