Ambidentate Ligands

Q.

What is meant by unidentate, didentate and ambidentate ligands? Give two examples for each.

Q. SCN is

1. bidentate
2. ambidentate
3. chelate
4. monodentate

Q.

What is the number of donor atoms in dimethylglyoximato ligand?

1. 1

2. 2

3. 3

4. 4

Q.

Is ${\mathrm{PPh}}_{3_{}}$a strong ligand?

Q.

Is water a bidentate ligand?

Q. What is the hybridisation of central atom in N20 (nitrous oxide).

Q. For the complex ion dichloridobis(ethylenediamine)cobalt (III), select the correct statement.

1. It has three isomers, two of them are optically active and one is optically inactive
2. It has three isomers, all of them are optically active.
3. It has isomers, all of them are optically inactive.
4. It has one optically active isomer and two geometrical isomers.

Q.

Is H2O an ambidentate ligand or a unidentate ligand?

Q. Which of the following is an ambidentate ligand ?

1. $S{O}_3^{2-}$
2. $C{N}^{-}$
3. $N{H}_3$
4. $H_{2}O$

Q.

Name the type of isomerism when ambidentate ligands are attached to central metal ion. Give two examples of ambidentate ligands.

Q.

In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct answer out of the following choices.
(a) Assertion and reason both are true, reason is correct explanation of assertion.
(b) Assertion and reason both are true but reason is not the correct explanation of assertion.
(c) Assertion is true, reason is false.
(d) Assertion is false, reason is true.

Assertion (A) Linkage isomerism arises in coordination compounds containing ambidentate ligand.
Reason (R) Ambidentate ligand has two different donor atoms.

Q.

Ethylene Diamine is a____.

Q.

Can a didentate ligand act also as an ambidentate ligand ?

Q. Which of the following molecule(s) is/are having a see - saw geometry?

1. $TeB{r}_4$
2. $TeC{l}_4$
3. $Xe{O}_2{F}_2$
4. $S{F}_4$

Q. Identify the correct statements for the behaviour of ethane-1, 2-diamine as a ligand.
(i) It is a neutral ligand.
(ii) It is a didentate ligand.
(iii) It is a chelating ligand.
(iv) It is a unidentate ligand.

1. (i). (ii) and (iii)
2. (ii) and (iii)
3. (iii) and (iv)
4. (i), (iii) and (iv)
   

Q. Find the value of $\frac{X}{Y}$ for the complex $\left[CoB{r}_2\right(CN\left)\right(N{O}_2\left)\right(H_{2}O\left)\right(N{H}_3\left)\right]$
where:
X = Number of compounds when both $B{r}^{-}$ are at cis position.
Y = Number of compounds when both $B{r}^{-}$ are at trans position.

Q. $\left[Co\right(N{H}_3{)}_{5}S{O}_4]Br$ and $\left[Co\right(N{H}_3{)}_{5}Br]S{O}_4$ are _______

1. Ionisation isomers
2. Linkage isomers
3. Coordination isomers
4. Hydrate isomers

Q. Which is the best hydride donor ?

1. $R-\underset{OH}{\underset{|}{\stackrel{H}{\stackrel{|}{C}}}-}{O}^{-}$
2. $R-\underset{O^{-}}{\underset{|}{\stackrel{H}{\stackrel{|}{C}}}}-O^{-}$
3. $R-\underset{H}{\underset{|}{\stackrel{H}{\stackrel{|}{C}}}}-Cl$
4. $R-\underset{H}{\underset{|}{C}}=O$

Q. Ammonia acts as a very good ligand but ammonium ion does not form complexes because:

1. $N{H}_3$ is a gas while $N{H}_4^{+}$ in liquid form
2. $N{H}_3$ undergoes $s{p}^3$ hybridisation while $N{H}_4^{+}$ undergoes $s{p}^{3}d$ hybridisation
3. $N{H}_4^{+}$ ion does not have any lone pair of electrons
4. $N{H}_4^{+}$ ion has one unpaired electron while $N{H}_3$ has two unpaired electrons.

Q. Assertion :EDTA is a hexadentate ligand. Reason: Denticity of a ligand is given by number of lone pairs donated to central atom by a ligand.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Answer is following by appropriately matching the lists based on the information given in the paragraph. Ligands are broadly classified into two classes classical and non classical ligands depending on thier doner and acceptability. Bonding mechanism which is non classical is called synegic bonding.
In hte following list-I contains some complex and list-II contains the characterestics of complex.
$\begin{array}{cc}\text{List-I}& \text{List-II}\\ \left(Compounds\right)& \\ \left(I\right)\left[Pt\right(N{O}_2{)}_2(en{)}_2{]}^{2+}& \left(P\right)\text{Stable according to EAN-Rule}\\ \left(II\right)\left[Cr\right(\pi -C_6{H}_6\left)\right(NO{)}_2]& \left(Q\right)\text{Both ligands acts as ambidentate}\\ \left(III\right)\left[Ir\right(SCN\left)\right(S{O}_4\left)\right(N{H}_3{)}_4]& \left(R\right)\text{Bond order M - L bond > 1.0}\\ \left(IV\right)\left[V\right(C_2{H}_4\left)\right(CN{)}_5]& \left(S\right)BondorderofLigandsdecreases\\ & \left(T\right)Co-ordinationnumberofcentralmetalissix\end{array}$
Which of the following options has the correct combination considering List-I and List-II?

1. I, Q
2. IV, Q
3. I, R
4. II, P

Q. Does the size of a central metal atom has any effect on the pairing by the ligands?

Q.

A research guide instructed his two students to synthesize complex
$\left[Co\right(N{H}_3{)}_5\left(N{O}_2\right)]C{l}_2$
They synthesized the complexes with identical molecular formula, molar mass, geometry, conductance and spin, but they differed in colour. Bases on the above facts the following question.

(ii) Which of the ligands can show ambient property?

1. $N{O}_2$

2. $H_{2}O$

3. $C{O}_3^{2-}$

4. $N{H}_3$

Q. A metal ion $M^{n+}$ having $d^4$ valence electronic configuration combines with three bidentate ligands to form a complex compound. Assuming $△a>p$:
(i) Write the electronic configuration of $d^4$ ion.
(ii) What type of hybridisation will $M^{n+}$ ion has?
(iii) Name the type of isomerism exhibited by this complex.

Q. Find the value of $\frac{X}{Y}$ for the complex $\left[CoB{r}_2\right(CN\left)\right(N{O}_2\left)\right(H_{2}O\left)\right(N{H}_3\left)\right]$
where:
X = Number of compounds when both $B{r}^{-}$ are at cis position.
Y = Number of compounds when both $B{r}^{-}$ are at trans position.

Q. When alpha particles heat nitrogen atom what happens

Q.

Unidentate ligands with more than one co-ordinating atoms are called as

1. Organic ligands

2. Positive ligands

3. Ambidentate ligands

4. Neutral ligands

Q. The following ligand is:

1. tetradentate
2. bidentate
3. hexadentate
4. tridentate

Q.

The formation of $P{H}_4^{+}$ is difficult compared to $N{H}_4^{+}$ because:

1. lone pair of phosphorous resides in $s{p}^3$ orbital

2. lone pair of phosphorous resides in almost pure p – orbital

3. lone pair of phosphorous in almost pure s – orbital

4. lone pair of phosphorous is optically inert.

Q. Which is the pair of ambidant ligands ?

1. $NC{S}^{-},C_2{O}_4^{2-}$
2. $N{O}_3^{-},SCN$
3. $N_3^{-},N{O}_2^{-}$
4. $C{N}^{-},N{O}_2^{-}$