Chapter 19, Problem 19.27QE

(a)

Interpretation Introduction

Interpretation:

Formula for coordination compound has to be given, which is chromium $\left(\text{III}\right)$ chloride, in which one ${\text{Cl}}^{\text{-}}$ and five water molecules are coordinated to the metal.

Concept Introduction:

Nomenclature of coordination compounds:

Rules of Union of Pure and Applied Chemistry (IUPAC) system of nomenclature are,

• In coordination compounds, cation name comes first then anion. Name of ligands are given in the order of alphabetical then metal cation followed by the oxidation state in Roman numeral in parentheses then the anions are named.
• If one type of ligand is comes more times means it can be named with prefix: $\left(1\right)$ mono- (usually omitted), $\left(2\right)$ di-, $\left(3\right)$ tri-, $\left(4\right)$ tetra flowed by its name.
• Metal in the anionic complex is named as –ate in its suffix.

(b)

Interpretation Introduction

Interpretation:

Formula for coordination compound has to be given, ${\text{CrCl}}_{\text{3}}{\text{·4NH}}_{\text{3}}$, which contains two coordinated chloride ions.

Concept Introduction:

Refer to part (a)

(c)

Interpretation Introduction

Interpretation:

Formula for coordination compound has to be given, the potassium salt of the coordination complex containing six ${\text{CN}}^{\text{-}}$ ions and $\text{Fe}\left(\text{III}\right)$.

Concept Introduction:

Refer to part (a)