Chapter 23: Problem 1

Discuss the main points of Werner theory. What is the significance?

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Werner's Theory, developed by Swiss chemist Alfred Werner, revolutionized the understanding of coordination compounds. The primary points of this theory are the concepts of primary and secondary valencies, the former are ionizable and usually satisfied by negative ions while the latter are non-ionizable. The secondary valency forms a specific geometry around the central metal atom. This theory has major significance in understanding the structure and bonding in coordination compounds and laid the foundation for coordination chemistry.

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Introduction to Werner's theory

Alfred Werner (1866-1919) was a Swiss chemist who developed the coordination theory of chemical structure & bonding. Werner’s theory focuses on coordination compounds, compounds where a central metal atom is surrounded by a group of ions or molecules, also known as ligands.

Main Points of Werner’s Theory

The primary points of Werner's theory are: 1. In coordination compounds, metals show two types of linkages - primary and secondary.2. Primary valencies are ionizable and are usually satisfied by negative ions.3. Secondary valencies are non-ionizable. They are satisfied by neutral molecules or ions.4. The secondary valency is equal to the oxidation state of the metal ion.5. The secondary valencies are directed in space to form certain geometrical figures.

Discussing the impact of Werner’s Theory

Before Werner's theory, it was assumed that all the compounds were linked in a similar way. Werner revolutionized this understanding by proposing two types of linkages. His theory led to a deeper understanding of the structures and properties of coordination compounds.

Significance of Werner's Theory

The significance of Werner's theory lies in the fact that it helps in explaining the structure and bonding in coordination compounds. It offers insights into their chemical behaviour, reactivity and the physical properties they exhibit. The theory set down the foundation for coordination chemistry.

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Discuss the main points of Werner theory. What is the significance?

Short Answer

Step by step solution

Introduction to Werner's theory

Main Points of Werner’s Theory

Discussing the impact of Werner’s Theory

Significance of Werner's Theory

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