Calculate the effective atomic number (e.a.n) of copper in Cu NH 3 4 2 + [ Z of Cu = 29 ] Explain ionisation isomerism in coordination compounds with a suitable example.

Effective atomic number represents the total number of electrons present around the central metal ion. It can be calculated by using the formula: EAN = Atomic number - Oxidation state of central atom + No . of electrons donated by ligand EAN Cu NH 3 4 2 + = 29 - 2 + 4 × 2 = 35 Therefore, effective atomic number of Cu NH 3 4 2 + is 35 . Ionization isomerism is a type of isomerism which arises when the counter ion in a complex salt is itself a potential ligand and can displace a ligand which can then become the counter ion. Examples, Co NH 3 5 SO 4 Br Co NH 3 5 Br SO 4

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Metal carbonyls can have formula $M {(CO)}_{n},$ where $n =$ number of $CO$ units coordinated to metal $M$ . What is the formula of the carbonyl of $Fe (26)$ if EAN of $Fe$ in metal carbonyl is $36$ ?

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Important Questions on Coordination Compounds

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

The number of ions produced in water by dissolution of the complex having the empirical formula,

{CoCl}_{3} 4 {NH}_{3},

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at

25^{o} C

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

On treatment of

100 mL

0.1 M

solution of

{CoCl}_{3} . 6 H_{2} O

with excess

{AgNO}_{3}; 1 .2 \times 10^{22}

ions are precipitated. The complex is:

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

The volume $(i n m L)$ of $0.125 M {A g N O}_{3}$ required to quantitatively precipitate chloride ions in $0.3 g$ of $[C o {(N H_{3})}_{6}] C l_{3}$ is __________.
${}^{M}{[C o {(N H_{3})}_{6}]} C l_{3} = 267.46 g / m o l$
${}^{M}{A g N O}_{3} = 169.87 g / m o l$

Report the nearest integer as the answer.

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

The

EAN

value

[Ti {(σ - C_{6} H_{5})}_{2} {(π - C_{5} H_{5})}_{2}] °

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

Which one of the following complexes will consume more equivalents of aqueous solution of

{AgNO}_{3}

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

2.33

g of compound

X

(empirical formula

{CoH}_{12} N_{4} {Cl}_{3}

) upon treatment with excess

{AgNO}_{3}

solution produces

1 .435 g

of white precipitate. The primary and secondary valencies of cobalt in compound

X,

respectively, are

[Given: Atomic mass:

C o = 59, C l = 35.5, A g = 108]

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

Which of the following types of valences, according to Werner's theory, is also called as primary valence ?

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

The effective atomic number (EAN) of platinum in potassium hexachloroplatinate(IV) is

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

Identify complex ion in which effective atomic number of the central metal ion is

35

(

Given At. Number of

Co = 27, Fe = 26, Zn = 30)

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

According to Werner’s theory the geometry of the complex is determined by

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

What is effective atomic number of

Fe

{[Fe {(CN)}_{6}]}^{4 -}

(At. no. of

Fe = 26

)

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

Addition of excess of ${AgNO}_{3}$ to an aqueous solution of $1$ mole of ${PdCl}_{2} \cdot 4 {NH}_{3}$ gives $2$ moles of $AgCl$ . The conductivity of this solution corresponds to:

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

The correct order of the stoichiometries of

AgCl

formed when

{AgNO}_{3}

is treated in excess with the complexes:

{CoCl}_{3} . 6 {NH}_{3}, {CoCl}_{3} . 5 {NH}_{3}, {CoCl}_{3} . 4 {NH}_{3}

, respectively, is:

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

A coordination complex compound of cobalt has the molecular formula containing five ammonia molecules, one nitro group and two chlorine atoms for one cobalt atom. One mole of this compound produces three mole ions in an aqueous solution. On reacting with an excess of

{AgNO}_{3},

two moles of

AgCl

is precipitated. The ionic formula for this complex would be

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

The conductivity measurement of a coordination compound of cobalt (III) shows that it dissociates into 3 ions in solution. The compound is

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

A d-block metal

M

forms two complexes with the formulae

{MCl}_{4} . 2 HCl

and

{MCl}_{2} . 2 {NH}_{3}

. When excess of

A g N O_{3}

solution is added to

1

mole of each complex,

A g C l

precipitate is not formed. The secondary valency of metal

M

in the complexes is respectively

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

Calculate the effective atomic number (e.a.n) of copper in

{[Cu {({NH}_{3})}_{4}]}^{2 +}

[Z

Cu = 29]

Explain ionisation isomerism in coordination compounds with a suitable example.

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

Which of the following complex ions is most stable?

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Werner's Theory of Coordination Compounds

Which of the following co-ordinate complexes is an exception to EAN rule?

(Given At. Number Pt = 78, Fe = 26, Zn = 30, Cu = 29)

Metal carbonyls can have formula MCOn, where n= number of CO units coordinated to metal M. What is the formula of the carbonyl of Fe 26 if EAN of Fe in metal carbonyl is 36?

Important Questions on Coordination Compounds

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Metal carbonyls can have formula $M {(CO)}_{n},$ where $n =$ number of $CO$ units coordinated to metal $M$ . What is the formula of the carbonyl of $Fe (26)$ if EAN of $Fe$ in metal carbonyl is $36$ ?