• Home
  • Textbooks
  • Descriptive Inorganic Chemistry
  • Synthesis and Reactions of Coordination Compounds

Descriptive Inorganic Chemistry

James House, Kathleen A. House

Chapter 20

Synthesis and Reactions of Coordination Compounds - all with Video Answers

Educators

Chapter Questions

02:12

Problem 1

Identify the type of reaction for each of the following processes.
(a) $(\mathrm{CO})_5 \mathrm{MnCH}_3 \rightarrow(\mathrm{CO})_4 \mathrm{MnCOCH}_3$
(b) $\mathrm{HIr}(\mathrm{CO}) \mathrm{Cl}\left(\mathrm{PEt}_3\right)_2\left(\mathrm{C}_2 \mathrm{H}_4\right) \rightarrow \operatorname{Ir}(\mathrm{CO}) \mathrm{Cl}\left(\mathrm{PEt}_3\right)_2 \mathrm{CH}_2 \mathrm{CH}_3$
(c) $\mathrm{H}(\mathrm{CO})_3 \mathrm{CoH}_2 \mathrm{C}=\mathrm{CHR} \rightarrow(\mathrm{CO})_3 \mathrm{CoCH}_2 \mathrm{CH}_2 \mathrm{R}$

Nadir Iqbal
Nadir Iqbal
Numerade Educator
03:28

Problem 2

For each of the following reactions, draw the structure of the product that results.
(a) trans-[Ir( $\left.[\mathrm{CO}) \mathrm{Cl}\left(\mathrm{PEt}_3\right)_2\right]$ reacting with 1 mole of gaseous $\mathrm{HBr}$
(b) $\mathrm{Mo}(\mathrm{CO})_6$ reacting with excess pyridine, $\mathrm{C}_5 \mathrm{H}_5 \mathrm{~N}$
(c) The reaction of cobalt with $\mathrm{CO}$ at elevated temperature and pressure

Mikayla Stephens
Mikayla Stephens
Numerade Educator
03:10

Problem 3

For each of the following reactions, draw the structure of the product that results.
(a) The insertion reaction of $\mathrm{Fe}(\mathrm{NO})(\mathrm{CO})_3 \mathrm{Cl}$ with $\mathrm{SO}_2$
(b) The reaction of $\mathrm{Co}(\mathrm{CN})_5{ }^{3-}$ with $\mathrm{H}_2 \mathrm{O}_2$
(c) $\mathrm{PtCl}_4{ }^{2-}$ reacting with 1 mole of $\mathrm{NH}_3$ followed by 1 mole of $\mathrm{NO}_2{ }^{-}$

Shazia Naz
Shazia Naz
Numerade Educator
01:26

Problem 4

In contrast to other tetrahedral complexes, those of $\mathrm{Be}^{2+}$ undergo slow substitution, usually by an $\mathrm{S}_{\mathrm{N}} 1$ process. What is the basis for this behavior?

Emily Himsel
Emily Himsel
Numerade Educator
01:09

Problem 5

Suppose a series of complexes of trans-[ $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{LCl}\right]$ is prepared where $\mathrm{L}$ is $\mathrm{NH}_3, \mathrm{Cl}^{-}$, $\mathrm{NO}_2{ }^{-}, \mathrm{Br}^{-}$, or pyridine $\left(\mathrm{C}_5 \mathrm{H}_5 \mathrm{~N}\right)$. If the position of the $\mathrm{Pt}-\mathrm{Cl}$ stretching band is determined for each complex, arrange the values in the order of increasing wave number $\left(\mathrm{cm}^{-1}\right.$ ) for the series of ligands $\mathrm{L}$ and explain your answer.

Aadit Sharma
Aadit Sharma
Numerade Educator
05:13

Problem 6

The reaction
$$
\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{~F}_2\right]^{+}+\mathrm{H}_2 \mathrm{O} \rightarrow\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{FH}_2 \mathrm{O}\right]^{2+}+\mathrm{F}^{-}
$$
takes place much faster at $\mathrm{pH}=2$ than at $\mathrm{pH}=4$, although the reaction takes place slowly even in neutral solutions. Postulate a mechanism for this process, and give the expected rate law. Discuss the difference between the acid catalysis observed here and the $\mathrm{S}_{\mathrm{N}} 1 \mathrm{CB}$ mechanism.

David Collins
David Collins
Numerade Educator
03:40

Problem 7

Predict the configuration of the product for each of the following reactions.
(a) $\left[\mathrm{Pt}\left(\mathrm{H}_2 \mathrm{O}\right)_3 \mathrm{NO}_2\right]^{+}+\mathrm{NH}_3 \rightarrow$
(b) $\left[\mathrm{PtCl}_3 \mathrm{Br}\right]^{2-}+\mathrm{NH}_3 \rightarrow$
(c) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}\right]^{+}+\mathrm{CN}^{-} \rightarrow$

Pronoy Sinha
Pronoy Sinha
Numerade Educator
01:35

Problem 8

In trans-[$\left[\mathrm{Pd}\left(\left(\mathrm{CH}_3\right)_3 \mathrm{As}\right)_2 \mathrm{Cl}_2\right]$ the $\mathrm{Pd}-\mathrm{Cl}$ stretching band is at $375 \mathrm{~cm}^{-1}$, whereas for the corresponding cis complex it is at $314 \mathrm{~cm}^{-1}$. Explain this difference.

Hunza Gilgit
Hunza Gilgit
Numerade Educator
06:37

Problem 9

The reaction of two moles of $\left(\mathrm{C}_2 \mathrm{H}_5\right)_3 \mathrm{P}$ with $\mathrm{K}_2\left[\mathrm{PtCl}_4\right]$ produces a product having a different structure than is produced when two moles of $\left(\mathrm{C}_2 \mathrm{H}_5\right)_3 \mathrm{~N}$ react with $\mathrm{K}_2\left[\mathrm{PtCl}_4\right]$. Predict the structure in each case and explain the difference.

Anupa Sharad Medhekar
Anupa Sharad Medhekar
Numerade Educator
01:11

Problem 10

For the reaction
$$
\text { trans- }\left[\mathrm{Rh}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}+2 \mathrm{Y} \rightarrow \text { trans- }\left[\mathrm{Rh}(\mathrm{en})_2 \mathrm{Y}_2\right]^{+}+2 \mathrm{Cl}^{-}
$$
the following data were obtained:
$$
\begin{array}{|cccl|}
\hline \mathbf{Y}(\text { at } \mathbf{0 . 1 ~ M}) & \mathbf{I}^{-} & \mathbf{O H}^{-} & \mathrm{Cl}^{-} \\
\hline 10^5 k\left(\mathrm{~s}^{-1}\right) & 5.2 & 5.1 & 4.0 \\
\hline
\end{array}
$$
What mechanism does the reaction follow? Describe the transition state for this reaction. Would the same results be observed if $\mathrm{Cr}^{3+}$ were the metal ion? Why or why not?

Nicole Smina
Nicole Smina
Numerade Educator
01:38

Problem 11

When the reaction
$$
\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{ONO}\right]^{2+} \rightarrow\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{NO}_2\right]^{2+}
$$
is studied under high pressure, it is found that the rate increases as the pressure increases. This indicates that the transition state occupies a smaller volume than the initial complex. Describe a mechanism that is consistent with that observation.

Charles Thomas
Charles Thomas
Numerade Educator
02:17

Problem 12

If the reaction
$$
\left[\mathrm{ML}_4 \mathrm{AB}\right]+\mathrm{Y} \rightarrow\left[\mathrm{ML}_4 \mathrm{AY}\right]+\mathrm{B}
$$
takes place with the formation of a trigonal bipyramid transition state with $\mathrm{A}$ in an axial position, what should be the distribution of cis-[ $\left.\mathrm{ML}_4 \mathrm{AY}\right]$ and trans-[ $\left.\mathrm{ML}_4 \mathrm{AY}\right]$ in the products? Provide a brief explanation for your answer.

Ly Tran
Ly Tran
Numerade Educator
02:17

Problem 13

If the reaction
$$
\left[\mathrm{ML}_4 \mathrm{AB}\right]+\mathrm{Y} \rightarrow\left[\mathrm{ML}_4 \mathrm{AY}\right]+\mathrm{B}
$$
takes place with the formation of a trigonal bipyramid transition state with $\mathrm{A}$ in an in the products? Provide a brief explanation for your answer.

Ly Tran
Ly Tran
Numerade Educator

Problem 14

Suppose the reaction
$$
\left[\mathrm{ML}_4 \mathrm{AB}\right]+\mathrm{Y} \rightarrow\left[\mathrm{ML}_4 \mathrm{AY}\right]+\mathrm{B}
$$
in which $\mathrm{A}$ is a very large ligand (such as $\left.\mathrm{As}\left(\mathrm{C}_6 \mathrm{H}_5\right)_3\right)$ takes place with the formation of a trigonal bipyramid transition state with $\mathrm{A}$ in an equatorial position. What would you expect the distribution of cis-[ML $\left.{ }_4 \mathrm{AY}\right]$ and trans-[ML $\left.44 \mathrm{AY}\right]$ in the products to be? Explain your answer.

Check back soon!
07:21

Problem 15

If cis-[$\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{ClBr}\right]$ undergoes a substitution reaction with one $\mathrm{SCN}^{-}$replacing one $\mathrm{NH}_3$, draw the structure for the product. Why does the product not contain a Pt-NCS bond?

Ronald Prasad
Ronald Prasad
Numerade Educator
00:22

Problem 16

The synthesis of complexes containing the acetylacetonate ligand can be carried out in basic solutions. How does the base function? If the base is $\mathrm{NH}_3$, why is the product not a complex containing $\mathrm{NH}_3$ ?

David Collins
David Collins
Numerade Educator
04:28

Problem 17

Predict the product obtained by heating $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{ClH}_2 \mathrm{O}\right] \mathrm{SCN}$ as a solid complex. How might the product obtained by heating [ $\left.\mathrm{Pt}(\mathrm{en})_2 \mathrm{ClH}_2 \mathrm{O}\right] \mathrm{SCN}$ be different?

Ian Kaigh
Ian Kaigh
Numerade Educator
02:50

Problem 18

In this chapter, a series of ligands were arranged in order of their ability to produce a trans effect in complexes of $\mathrm{Pt}^{2+}$. Where would you place $\mathrm{SeCN}^{-}$in that series? Why?

Vasu Makani
Vasu Makani
Numerade Educator
View

Problem 19

When $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right) \mathrm{Cl}_3\right]^{-}$undergoes two successive substitution reactions involving $\mathrm{I}^{-}$and $\mathrm{H}_2 \mathrm{O}$, what will be the product? Explain your answer.

MM
Matthew Moffitt
Numerade Educator
05:04

Problem 20

Why is the trans effect less important for square planar complexes of $\mathrm{Ni}^{2+}$ than it is for complexes of $\mathrm{Pt}^{2+}$ ?

Sandra Lundell
Sandra Lundell
Numerade Educator
View

Problem 21

Draw the structure of the product obtained when cis- $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$ undergoes an oxad reaction with $\mathrm{Cl}_2$.

Ronald Prasad
Ronald Prasad
Numerade Educator
01:34

Problem 22

Starting with cis-[ $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$, devise a synthesis to prepare

Grigoriy Sereda
Grigoriy Sereda
Numerade Educator
01:39

Problem 23

Although $\mathrm{H}_2 \mathrm{C}=\mathrm{CH}_2$ was not listed in the series of ligands causing a trans effect, explain where you believe it would fit.

Aadit Sharma
Aadit Sharma
Numerade Educator
04:43

Problem 24

For each of the following reactions, consider the ligand $\mathrm{L}$ to be a nonreacting molecule such as $\left(\mathrm{C}_6 \mathrm{H}_5\right)_3 \mathrm{P}$. Draw the structure for the product in each case.
(a) $\left[\mathrm{RhL}_3 \mathrm{Cl}\right]+\mathrm{H}_2 \rightarrow$
(b) $\left[\mathrm{RhL}_3 \mathrm{Cl}\right]+\mathrm{HCl}(g) \rightarrow$
(c) $\left[\mathrm{L}_2(\mathrm{CO}) \mathrm{RhCH}_2 \mathrm{CH}_3 \mathrm{CO}\right]+\mathrm{CO} \rightarrow$
(d) $\left[\mathrm{L}_2 \mathrm{Rh}(\mathrm{CO}) \mathrm{H}\right]+\mathrm{H}_2 \mathrm{C}=\mathrm{CH}_2 \rightarrow$

April Berlyoung
April Berlyoung
Numerade Educator
01:31

Problem 25

Tell what type of reaction has occurred in each of the following cases, and draw the structures of the products.
(a) $\left[\mathrm{L}_2 \mathrm{Rh}(\mathrm{CO})_2\left(\mathrm{CH}_2 \mathrm{CH}_3\right)\right] \rightarrow\left[\mathrm{L}_2 \mathrm{Rh}(\mathrm{CO})\left(\mathrm{COCH}_2 \mathrm{CH}_3\right)\right]$
(b) $\left[\mathrm{L}_2 \mathrm{Rh}(\mathrm{CO})\left(\mathrm{COCH}_2 \mathrm{CH}_3\right)\right]+\mathrm{H}_2(\mathrm{~g}) \rightarrow\left[\mathrm{L}_2 \mathrm{HRhH}(\mathrm{CO})\left(\mathrm{COCH}_2 \mathrm{CH}_3\right)\right]$
(c) $\left[\mathrm{L}_2 \mathrm{Rh}(\mathrm{H})(\mathrm{CO})\left(\mathrm{C}_2 \mathrm{H}_4\right)\right] \rightarrow\left[\mathrm{L}_2 \mathrm{Rh}(\mathrm{CO})\left(\mathrm{CH}_2 \mathrm{CH}_3\right)\right]$

Mak Smith
Mak Smith
Numerade Educator
03:10

Problem 26

Tell whether the following complexes would be labile or inert, and explain your answer in each case.
(a) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}$
(b) $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
(c) $\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$
(d) $\left[\mathrm{CoF}_6\right]^{3-}$
(e) $\left[\mathrm{PtBr}_6\right]^{2-}$
(f) $\left[\mathrm{TiCl}_6\right]^{3-}$

HC
Hashim Choudhry
Numerade Educator
02:08

Problem 27

The ligand $\mathrm{Et}_4$ dien is $\left(\mathrm{C}_2 \mathrm{H}_5\right)_2 \mathrm{NCH}_2 \mathrm{CH}_2 \mathrm{NHCH}_2 \mathrm{CH}_2 \mathrm{~N}\left(\mathrm{C}_2 \mathrm{H}_5\right)_2$, and it forms stable chelates by coordinating through the three nitrogen atoms.
(a) Draw the structure for $\left[\mathrm{Pd}\left(\mathrm{Et}_4 \mathrm{dien}\right) \mathrm{Cl}\right]^{+}$ increases at high $\mathrm{pH}$. If the middle nitrogen has a $\mathrm{CH}_3$ group attached instead of a hydrogen atom, the rate of substitution is independent of $\mathrm{pH}$. Explain these observations and the mechanism in the cases where $\mathrm{H}$ or $\mathrm{CH}_3$ groups are bonded to the middle nitrogen.

Adriano Chikande
Adriano Chikande
Numerade Educator
View

Problem 28

The vanadium complexes $\left[\mathrm{V}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ and $\left[\mathrm{V}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ undergo exchange of $\mathrm{H}_2 \mathrm{O}$ with solvent water,
$$
\left[\mathrm{V}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{\mathrm{z+}}+\mathrm{H}_2 \mathrm{O}^* \rightarrow\left[\mathrm{V}\left(\mathrm{H}_2 \mathrm{O}\right)_5\left(\mathrm{H}_2 \mathrm{O}^*\right)\right]^{\mathrm{z+}}+\mathrm{H}_2 \mathrm{O}
$$
but the reactions take place at very different rates. How would you explain this observation?

Susan Hallstrom
Susan Hallstrom
Numerade Educator