One Co - Co bonds, six terminal CO and two bridging CO .

No Co - Co bonds, six terminal CO and two bridging CO .

No Co - Co bonds, four terminal CO and four bridging CO .

One Co - Co bonds, four terminal CO and four bridging CO .

MEDIUM

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Correct statement for these compounds is :

(i) $Co {(CO)}_{6}$

(ii) $Co {(CO)}_{5} {NH}_{3}$

(iii) $Co {(CO)}_{4} {({NH}_{3})}_{2}$

(iv) $Co {(CO)}_{3} {({NH}_{3})}_{3}$

(v) $Co {(CO)}_{2} {({NH}_{3})}_{4}$

(vi) $Co (CO) {({NH}_{3})}_{5}$

50% studentsanswered this correctly

Important Questions on Coordination Compounds

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

M n_{2} {(C O)}_{10}

is an organometallic compound due to the presence of:

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

Given below are two statements: one is labelled as “Assertion A” and the other is labelled as “Reason R”

Assertion A : In the complex $Ni (CO)_{4}$ and $Fe (CO)_{5}$ , the metals have zero oxidation state.

Reason R : Low oxidation states are found when a complex has ligands capable of $π$ -donor character in addition to the $σ$ -bonding.

In the light of the above statements, choose the most appropriate answer from the options given below

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

Number of bridging

CO

ligands in

[{Mn}_{2} {(CO)}_{10}]

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

Number of complexes which will exhibit synergic bonding amongst,

[Cr {(CO)}_{6}], [Mn {(CO)}_{5}]

and

[{Mn}_{2} {(CO)}_{10}]

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

The correct pair of orbitals involved in $\pi$ -bonding between metal and

CO

in metal carbonyl complexes is:

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

In the cobalt-carbonyl complex :

[{Co}_{2} {(CO)}_{8}]

, number of

Co - Co

bonds is "

X

" and terminal

CO

ligands is "

Y

X + Y =

___

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

Iron carbonyl,

Fe {(CO)}_{5}

is:

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

The reaction of aqueous

{[Ni {(H_{2} 0)}_{6}]}^{2 +}

Is performed by the addition of a bidentate ligand ethane-1, 2, diamine (en)
Match the following

	${[Ni {(H_{2} O)}_{6}]}^{2 +} :$ en molar ratio		Colour of the product
A	$1 : 1$	I	Pale blue
B	$1 : 2$	II	Blue / Purple
C	$1 : 3$	III	Violet
D		IV	Green

The correct match is

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

The number of bridging carbonyls in

{Co}_{2} {(CO)}_{8}

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

Low oxidation state of metals in their complexes are common when ligands

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

The correct statement(s) regarding the binary transition metal carbonyl compounds is (are) (Atomic numbers:

F e = 26, N i = 28

)

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

[{Co}_{2} {(CO)}_{8}]

displays

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

Discuss the nature of bonding in metal carbonyls.

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

How many bridging carbonyl(s) is/are present in the compound

{Fe}_{3} (CO)_{12}

compound?

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

The sum of bridging carbonyls in

W {(CO)}_{6}

and

{Mn}_{2} {(CO)}_{10}

is _____ .

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

Which of the following species is not stable?

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

The number of bridged

CO

ligands present in

{Fe}_{2} {(CO)}_{9}

and

{CO}_{2} {(CO)}_{8,}

respective are

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

Among the given complexes that possess " $CO$ " ligand bridges are

$\underset{I}{[{Co}_{2} {(CO)}_{8}]} \underset{II}{[{Fe}_{3} {(CO)}_{12}]} \underset{III}{[{Mn}_{2} {(CO)}_{10}]} \underset{IV}{[{Fe}_{2} {(CO)}_{9}]}$

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

The theory that can completely/properly explain the nature of bonding in

[Ni {(CO)}_{4}]

is:

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Bonding in Metal Carbonyls

Which of the following has the longest

C - O

bond length? (Free

C - O

bond length in

CO

1.128 \overset{o}{A}

Correct statement for these compounds is : (i) CoCO6 (ii) CoCO5NH3 (iii) CoCO4NH32 (iv) CoCO3NH33 (v) CoCO2NH34 (vi) CoCONH35

Important Questions on Coordination Compounds

Learn and Prepare for any exam you want !

Correct statement for these compounds is :

(i) $Co {(CO)}_{6}$

(ii) $Co {(CO)}_{5} {NH}_{3}$

(iii) $Co {(CO)}_{4} {({NH}_{3})}_{2}$

(iv) $Co {(CO)}_{3} {({NH}_{3})}_{3}$

(v) $Co {(CO)}_{2} {({NH}_{3})}_{4}$

(vi) $Co (CO) {({NH}_{3})}_{5}$