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Assertion:In a complex prefixes cis- and...

Assertion:In a complex prefixes cis- and trans - are used to designate adjacent and opposite geometric location of the ligands
Reason: With in the coordination sphere ligands are named after the metal atom (or) ion

A

Both Assertion & Reason are true ,Reason is the correct explanation of Assertion

B

Both Assertion & Reason are true, Reason is not correct explanation of Assertion

C

Assertion is true , Reason is false

D

Assertion is false , Reason is false

Text Solution

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The correct Answer is:
C
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Complex compounds are molecular compounds which retain their indentities even when dissolved in water. They do not give all the simple ions in solution but instead furnish complex ions. The complex compounds are often called coordination compounds because certain groups called ligands are attached to the central metal ion by coordinate or dative bonds. Coordination compounds exhibit isomerism, both structural and stereoisomerism. The struculre, magnetic property, colour and electrical properties of complexes are explained by various theories. which of the following pairs, both the complexes have the same geometry?

Complex compounds are molecular compounds which retain their indentities even when dissolved in water. They do not give all the simple ions in solution but instead furnish complex ions. The complex compounds are often called coordination compounds because certain groups called ligands are attached to the central metal ion by coordinate or dative bonds. Coordination compounds exhibit isomerism, both structural and stereoisomerism. The struculre, magnetic property, colour and electrical properties of complexes are explained by various theories. The oxidation number, coordination number and magnetic moment in the following complex Na_(3)[Cr(CN)_(6)] is :

Complex compounds are molecular compounds which retain their indentities even when dissolved in water. They do not give all the simple ions in solution but instead furnish complex ions. The complex compounds are often called coordination compounds because certain groups called ligands are attached to the central metal ion by coordinate or dative bonds. Coordination compounds exhibit isomerism, both structural and stereoisomerism. The struculre, magnetic property, colour and electrical properties of complexes are explained by various theories. Arrange the following compounds in order of of their molar conductance : i) K[Co(NO_(2))_(4)(NH_(3))_(2)] ii) [Cr(ONO)_(3)(NH_(3))_(3)] iii) [Cr(NO_(2))(NH_(3))_(5)]_(3)[Co(NO_(2))_(6)]_(2) iv) Mg[Cr(NO_(2))_(5)(NH_(3))]

Why is geometrical isomerism not possible in tetrahedral complexes having two different types of unidentate ligands Co-ordinated with the central metal ion ?

Assertion: A cis-isomer has a net dipole moment zero. Reason: cis- isomers has two ligands of the different type occupying adjacent positions.

In octahedral complexes having co-ordination number 6, the degeneracy of the d-orbitals of central atom is removed due to ligand electron metal electron repulsions. In the octahedral complex three orbitals have lower energy, t_(2g) set and two orbitals have higher energy, eg set. This phenomenon is formed as crystal field splitting and the energy seperation is denoted by Delta_(0) . Thus the energy of the two eg orbitals will increase by (3//5)Delta_(0) and that of the three t_(2g) will decrease by (2//5)Delta_(0) . The erystal field splitling, Delta_(0) depends upon the field produced by the ligand and charge on the metal ion. Some ligands are able to produce strong field and in these cases, the splitting will be large whereas other produce weak fields and consequently result in small splitting of d-orbitals. In an octahedral crystal field, t_(2g) orbitals are

In octahedral complexes having co-ordination number 6, the degeneracy of the d-orbitals of central atom is removed due to ligand electron metal electron repulsions. In the octahedral complex three orbitals have lower energy, t_(2g) set and two orbitals have higher energy, eg set. This phenomenon is formed as crystal field splitting and the energy seperation is denoted by Delta_(0) . Thus the energy of the two eg orbitals will increase by (3//5)Delta_(0) and that of the three t_(2g) will decrease by (2//5)Delta_(0) . The erystal field splitling, Delta_(0) depends upon the field produced by the ligand and charge on the metal ion. Some ligands are able to produce strong field and in these cases, the splitting will be large whereas other produce weak fields and consequently result in small splitting of d-orbitals. If Delta_(0)ltP , the correct electronic configuration of d^(4) system will be

In octahedral complexes having co-ordination number 6, the degeneracy of the d-orbitals of central atom is removed due to ligand electron metal electron repulsions. In the octahedral complex three orbitals have lower energy, t_(2g) set and two orbitals have higher energy, eg set. This phenomenon is formed as crystal field splitting and the energy seperation is denoted by Delta_(0) . Thus the energy of the two eg orbitals will increase by (3//5)Delta_(0) and that of the three t_(2g) will decrease by (2//5)Delta_(0) . The erystal field splitling, Delta_(0) depends upon the field produced by the ligand and charge on the metal ion. Some ligands are able to produce strong field and in these cases, the splitting will be large whereas other produce weak fields and consequently result in small splitting of d-orbitals. Predict the order of Delta_(0) for the following compound i) [Fe(H_(2)O)_(6)]^(+2) ii) [Fe(CN)2(H_(2)O)_(4) iii) [Fe(CN)_(4)(H_(2)O)_(2)]^(2-)

On the basis of stability of complex extity in the solution, complexes may be of two types, perfect, imperfect complexes, the stabilies depends upon the extent of dissociation which in turn depends on the strength of M-L band. The dissociation of complex may be expressed [ML_(x)P^(+)hArrMy^(+)+xL and eq. constant of this dissociation equilibrium is called instability constant. The stability of complex depends are EAN, charge on central atom, basic nature chelation, nature of metal ion and ligand acc. to HSAB principle Which complex in most stable ?

AAKASH SERIES-COMPLEX COMPOUNDS -Objective Exercise-4
  1. Assertion: [Cu(CN)4]^(2-) is more stable than [Cu(H2O)4]^(2+) Reason...

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  2. (A): [Fe(edta)] complex is octahedral in shape (R): edta ligand is ...

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  3. Assertion:Ni(CO)4 complex is tetrahedral in shape Reason: Ni atom u...

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  4. (A): All square planar complexes can exhibit geometrical isomerism (...

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  5. Assertion: (Ph3P)3RhCl is Wilkinson's catalyst. Reason: (Ph3P)3RhCl ...

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  6. Assertion: Willkinson's catalyst contains Ti^(4+) as the metal cation ...

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  7. Assertion: Optical isomerism is not shown by square planar complexes. ...

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  8. Assertion: [Cu(en)2]^(2+) is more stable than [Cu(NH3)4]^(2+) Reason...

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  9. Assertion: The ligands nitro and nitrito are called ambidentate ligand...

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  10. Assertion: The total number of isomers shown by [Co(en)2Cl2]^(+) compl...

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  11. Assertion: Number of unpaired electrons present in [Cu(NH3)2](+) comp...

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  12. Assertion: The number of unpaired electrons in Ni(CO)4 complex is zero...

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  13. Assertion: The coordination entity of the type [PtCl2(en)2]^(+2) show...

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  14. Assertion: The spin only magnetic moment of [MnBr4]^(2-) is 5.9 BM ...

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  15. Assertion: [Fe(CN)6]^(3-) is weakly paramagnetic while [Fe(CN)6]^(4-)...

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  16. Assertion:In a complex prefixes cis- and trans - are used to designate...

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  17. Assertion: The geometrical isomers of the complex [M(NH3)4Cl2] are opt...

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  18. Assertion: The number of unpaired electrons present in [CuCl2]^(-) co...

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  19. Assertion: IUPAC name of K3[Fe(CN)6] is potassium hexacyanoferrate (II...

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  20. Assertion: Geometrical isomers of Co(NH3)4Cl2^+ differ in their colou...

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