Coordination Compounds

The difference in the number of unpaired electrons of a metal ion in its high spin and low-spin octahedral complexes is two. The metal ion is :

The species that can have a trans-isomer is :
(en = ehane-1, 2-diamine, ox = oxalate)

Three complexes,
[CoCl(NH3)5]
2+(I),
[Co(NH3)5H2O]3+ (II) and
[Co(NH3)6]
3+(III)
absorb light in the visible region. The correct order of the wavelength of light absorbed by them is :

The crystal field stabilization energy (CFSE) of [Fe(H2O)6]Cl2 and K2[NiCl4] respectively, are :

Which of the following complexes will shows geometrical isomerism ?

In Wilkinson's catalyst, the hybridization of central metal ion and its shape are respectively :

The correct combination is :

The total number of possible isomers for square-planar [Pt(Cl)(NO2)(NO3)(SCN)]2- is :

The correct order of spin-only magnetic moments among the following is :
(Atomic number : Mn = 25, Co = 27, Ni = 28, Zn = 30)

Consider the following reaction and statements:
[Co(NH3)4Br2]+ + Br- \(\to\) [Co(NH3)3Br3] + NH3
(I) Two isomers are produced if the reactant complex ion is a cis-isomer
(II) Two isomers are produced if the reactant complex ion is a trans-i...

The oxidation states of Cr in [Cr(H2O)6]Cl3, [Cr(C6H6)2] and K2[Cr(CN)2(O)2(O2)(NH3)] respectively are :

[Co2(CO)8] displays :

On treatment of 100 mL of 0.1 M solution of CoCl3. 6H2O with excess AgNO3; 1.2 \(\times\) 1022 ions are precipitated. The complex is :

Identify the correct trend given below : (Atomic No.=Ti : 22, Cr : 24 and Mo : 42)

Which one of the following complexes will consume more equivalents of aqueous
solution of Ag(NO3)?

Which of the following is an example of homoleptic complex?

The pair having the same magnetic moment is :
[At. No.: Cr = 24, Mn = 25, Fe = 26, Co = 27]

Which one of the following complexes shows optical isomerism?
(en = ethylenediamine)

Which of the following compounds is not colored yellow?

The number of geometric isomers that can exist for square planar [Pt (Cl) (py) (NH3) (NH2OH)]+ is (py = pyridine) :

The octahedral complex of a metal ion M3+ with four monodentate ligands L1, L2, L3 and L4 absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is :

The equation which is balanced and represents the correct product(s) is :

Which of the following complex species is not expected to exhibit optical isomerism?

Which among the following will be named as dibromidobis (ethylene diamine) chromium(III) bromide?

Which of the following facts about the complex [Cr (NH3)6 ]Cl3 is wrong?

The magnetic moment (spin only) of [NiCl4]2− is

Which one of the following has an optical isomer ?
(en = ethylenediamine)

A solution containing 2.675g of CoCl3. 6NH3 (molar mass = 267.5 g mol–1) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of AgNO3 to give
4.78 g of AgCl (molar mass = 143.5 g mol–1). The...

Which of the following pairs represents linkage isomers ?

Which of the following has an optical isomer ?

In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of \(\Delta _o\) be the highest?

The coordination number and the oxidation state of the element ‘E’ in the complex [E(en)2(C2O4)]NO2 (where (en) is ethylene diamine) are, respectively,

Which one of the following has a square planar geometry?

Nickel (Z = 28) combines with a uninegative monodentate ligand X– to form a paramagnetic complex [NiX4]2− . The number of unpaired electron(s) in the nickel and geometry of this complex ion are,
respectively

The IUPAC name for the complex [Co(NO2)(NH3)5]Cl2 is

In Fe(CO)5, the Fe – C bond possesses :

How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral
complex with a Ca2+ ion?

The value of the ‘spin only’ magnetic moment for one of the following configurations
is 2.84 BM. The correct one is :

The IUPAC name of the coordination compound K3[Fe(CN)6] is

The oxidation state of Cr in [Cr(NH3)4Cl2]+ is :

Which one of the following cyano complexes would exhibit the lowest value of
paramagnetic behaviour?
(At. No. Cr = 24, Mn = 25, Fe = 26, Co = 27)

Which of the following compounds shows optical isomerism?

Among the properties (a) reducing (b) oxidising (c) complexing, the set of properties shown by CN– ion
towards metal species is :

Coordination compound have great importance in biological systems. In this context which of
the following statements is incorrect?

Which one of the following complexes in an outer orbital complex?

The coordination number of central metal atom in a complex is determined by :

Which one the following has largest number of isomers? (R = alkyl group, en = ethylenediamine)

The correct order of magnetic moments (spin only values in B.M.) among is :
(Atomic numbers: Mn = 25; Fe = 26, Co =27)

Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solutions but not in acidic solutions. What is the reason for it?

One mole of the complex compound Co(NH3)5Cl3, gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of AgNO3 solution to yield two moles of AgCl (s). The structure of the complex is :