Structural formula for the following compounds has to be written. (a) potassium hexacyanoferrate (II) (b) tetraamminedichlororcobalt(III) chloride (c) tetrachloroplatinate(II) ion. Concept Introduction: Complex compounds are primarily formed by transition elements which are d-block elements. A co-ordination compound is known as a complex compound is made of metal atom/ion and ligand(s). Ligands are considered as Lewis bases and the central metal atom is Lewis acid. Ligands donate a pair of electron to metal ion and establish bonding with metal ion which is known as co-ordinate bond and hence these compounds are named as co-ordination compounds. The ligands represented inside the square brackets adjacent to the central metal ion, which is termed as co-ordination sphere. Oxidation number of transition metal in its co-ordination compound refers to charge of the metal atom or ion. It is calculated as - o x i d a t i o n number = charge on complex ion - total charge of ligands

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Chapter 22.4, Problem 22.2E

Interpretation Introduction

Interpretation:

Structural formula for the following compounds has to be written.

(a) potassium hexacyanoferrate (II)

(b) tetraamminedichlororcobalt(III) chloride

(c) tetrachloroplatinate(II) ion.

Concept Introduction:

Complex compounds are primarily formed by transition elements which are d-block elements. A co-ordination compound is known as a complex compound is made of metal atom/ion and ligand(s). Ligands are considered as Lewis bases and the central metal atom is Lewis acid. Ligands donate a pair of electron to metal ion and establish bonding with metal ion which is known as co-ordinate bond and hence these compounds are named as co-ordination compounds. The ligands represented inside the square brackets adjacent to the central metal ion, which is termed as co-ordination sphere.

Oxidation number of transition metal in its co-ordination compound refers to charge of the metal atom or ion. It is calculated as -

oxidation number = charge on complex ion - total charge of ligands

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