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Chapter 21: Problem 42

Draw structures of each of the following. a. cis-dichloroethylenediamineplatinum(II) b. trans-dichlorobis(ethylenediamine)cobalt(II) c. cis-tetraamminechloronitrocobalt(III) ion d. trans-tetraamminechloronitritocobalt(III) ion e. trans-diaquabis(ethylenediamine)copper(II) ion

Short Answer

Expert verified
The structures of the given coordination complexes are as follows: a. cis-dichloroethylenediamineplatinum(II): ![cis-dichloroethylenediamineplatinum(II)](https://i.imgur.com/mxc9U5l.png) b. trans-dichlorobis(ethylenediamine)cobalt(II): ![trans-dichlorobis(ethylenediamine)cobalt(II)](https://i.imgur.com/ogtaMCy.png) c. cis-tetraamminechloronitrocobalt(III) ion: ![cis-tetraamminechloronitrocobalt(III) ion](https://i.imgur.com/97oppQ5.png) d. trans-tetraamminechloronitritocobalt(III) ion: ![trans-tetraamminechloronitritocobalt(III) ion](https://i.imgur.com/gZ2C2rA.png) e. trans-diaquabis(ethylenediamine)copper(II) ion: ![trans-diaquabis(ethylenediamine)copper(II) ion](https://i.imgur.com/oetxxCv.png)

Step by step solution

01

Identify the metal and ligands

In this complex, the central metal atom is platinum(II), and the ligands are two ethylenediamine (en) and two chloride (Cl) ligands.
02

Arrange the ligands in the cis position

In the cis position, the two chloride ligands are adjacent to each other while the two ethylenediamine ligands occupy the other two coordination sites.
03

Draw the structure

The final structure for cis-dichloroethylenediamineplatinum(II) can be drawn as: ![cis-dichloroethylenediamineplatinum(II)](https://i.imgur.com/mxc9U5l.png) b. trans-dichlorobis(ethylenediamine)cobalt(II)
04

Identify the metal and ligands

In this complex, the central metal atom is cobalt(II), and the ligands are two ethylenediamine (en) and two chloride (Cl) ligands.
05

Arrange the ligands in the trans position

In the trans position, the two chloride ligands are opposite to each other while the two ethylenediamine ligands occupy the other two coordination sites.
06

Draw the structure

The final structure for trans-dichlorobis(ethylenediamine)cobalt(II) can be drawn as: ![trans-dichlorobis(ethylenediamine)cobalt(II)](https://i.imgur.com/ogtaMCy.png) c. cis-tetraamminechloronitrocobalt(III) ion
07

Identify the metal and ligands

In this complex, the central metal atom is cobalt(III), and the ligands are four ammine (NH3), one chloride (Cl), and one nitro (NO2) ligands.
08

Arrange the ligands in the cis position

In the cis position, the chloride and nitro ligands are adjacent to each other while the four ammine ligands occupy the remaining coordination sites.
09

Draw the structure

The final structure for cis-tetraamminechloronitrocobalt(III) ion can be drawn as: ![cis-tetraamminechloronitrocobalt(III) ion](https://i.imgur.com/97oppQ5.png) d. trans-tetraamminechloronitritocobalt(III) ion
10

Identify the metal and ligands

In this complex, the central metal atom is cobalt(III), and the ligands are four ammine (NH3), one chloride (Cl), and one nitrito (NO2) ligands.
11

Arrange the ligands in the trans position

In the trans position, the chloride and nitrito ligands are opposite to each other while the four ammine ligands occupy the remaining coordination sites.
12

Draw the structure

The final structure for trans-tetraamminechloronitritocobalt(III) ion can be drawn as: ![trans-tetraamminechloronitritocobalt(III) ion](https://i.imgur.com/gZ2C2rA.png) e. trans-diaquabis(ethylenediamine)copper(II) ion
13

Identify the metal and ligands

In this complex, the central metal atom is copper(II), and the ligands are two ethylenediamine (en) and two water (H2O) ligands.
14

Arrange the ligands in the trans position

In the trans position, the two water ligands are opposite to each other while the two ethylenediamine ligands occupy the other two coordination sites.
15

Draw the structure

The final structure for trans-diaquabis(ethylenediamine)copper(II) ion can be drawn as: ![trans-diaquabis(ethylenediamine)copper(II) ion](https://i.imgur.com/oetxxCv.png)

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Most popular questions from this chapter

Which is more likely to be paramagnetic, \(\mathrm{Fe}(\mathrm{CN})_{6}^{4-}\) or \(\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}^{2+}\) ? Explain.

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The complex ion NiCl \(_{4}^{2-}\) has two unpaired electrons, whereas \(\mathrm{Ni}(\mathrm{CN})_{4}^{2-}\) is diamagnetic. Propose structures for these two complex ions.

Carbon monoxide is toxic because it binds more strongly to iron in hemoglobin \((\mathrm{Hb})\) than does \(\mathrm{O}_{2} .\) Consider the following reactions and approximate standard free energy changes: $$\begin{aligned} \mathrm{Hb}+\mathrm{O}_{2} \longrightarrow \mathrm{HbO}_{2} & \Delta G^{\circ}=-70 \mathrm{kJ} \\ \mathrm{Hb}+\mathrm{CO} \longrightarrow \mathrm{HbCO} & \Delta G^{\circ}=-80 \mathrm{kJ} \end{aligned}$$ Using these data, estimate the equilibrium constant value at $25^{\circ} \mathrm{C}$ for the following reaction: $$\mathrm{HbO}_{2}(a q)+\mathrm{CO}(g) \rightleftharpoons \mathrm{HbCO}(a q)+\mathrm{O}_{2}(g)$$

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