The coordination number of a central metal atom in a complex is determined bya)the number of ligands around a metal ion bonded by sigma and pi-bonds bothb)the number of ligands around a metal ion bonded by pi-bondsc)the number of ligands around a metal ion bonded by sigma bondsd)the number of only anionic ligands bonded to the metal ion.Correct answer is option 'C'. Can you explain this answer?

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

a)
the number of ligands around a metal ion bonded by sigma and pi-bonds both
b)
the number of ligands around a metal ion bonded by pi-bonds
c)
the number of ligands around a metal ion bonded by sigma bonds
d)
the number of only anionic ligands bonded to the metal ion.

Correct answer is option 'C'. Can you explain this answer?

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The coordination number of a central metal atom in a complex is determ...

The coor dination number of centr al metal atom in a complex is equal to number of monovalent ligands, twice the number of bidentate ligands and so on, around the metal ion bonded by coordinate bonds.
Hen ce coordin ation number = no. of s bonds for med by metals with ligands

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Complex compounds are molecular compounds which retain their identities 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 co-ordination compounds because certain groups called ligands are attached to the central metal ion by co-ordinate or dative bonds. Co-ordination compounds exhibit isomerism, both structural and stereoisomerism. The structure, magnetic property, colour and electrical properties of complexes are explained by various theories.Arrange the following compounds in order of their molar conductance :(i) K[Co(NO2)4(NH3)2](ii) [Cr(ONO)3(NH3)3](iii) [Cr(NO2)(NH3)5]3[Co(NO2)6]2(iv) Mg[Cr(NO2)5(NH3)]

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In coordination chemistry there are a variety of methods applied to find out the structures of complexes. One method involves treating the complex with known reagents and from the nature of reaction, the formula of the complex can be predicted. An isomer of the complex Co(en)2(H2O)Cl2B4, on reaction with concentrated H2SO4 (dehydrating agent) it suffers loss in weight and on reaction with AgNO3 solution it gives a white precipitate which is soluble in NH3(aq).Q.If all the ligands in the coordination spheres of the above complex be replaxed by SCN -, then the paramagnetic momentof the complex ion (due to spin only) will be

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Crystal field theory views the bonding in complexes as arising from electrostatic interaction and considers the effect of the ligand charges on the energies of the metal ion d-orbitals.In this theory, a ligand lone pair is modelled as a point negative charge that repels electrons in the d-orbitals of the central metal ion. The theory concentrated on the resulting splitting of the d-orbitals in two groups with different energies and used that splitting to rationalize and correlate the optical spectra, thermodynamic stability, and magnetic properties of complexes. This energy splitting between the two sets of dorbitals is called the crystal field splitting D.In general, the crystal field splitting energy D corresponds to wavelength of light in visible region of the spectrum, and colours of the complexes can therefore be attributed to electronic transition between the lower-and higher energy sets of d-orbitals.In general, the colour that the we see is complementry to the colour absorbed.Different metal ion have different values of D, which explains why their complexes with the same ligand have different colour.Similarly, the crystal field splitting also depends on the nature of ligands and as the ligand for the same metal varies from H2O to NH3 to ethylenediamine, D for complexes increases. Accordingly, the electronic transition shifts to higher energy (shorter wavelength) as the ligand varies from H2O to NH3 to en, thus accounting for the variation in colour.Crystal field theory accounts for the magnetic properties of complexes in terms of the relative values of and the spin pairing energy P. Small values favour high spin complexes, and large Dvalues favour low spin complexes.The [Ti(NCS)6]3- ion exhibits a single absorption band at 544 nm. W hat will be the crystal field splitting energy (KJ mol-1) of the complex ? (h = 6.626 x 10-34 J.s ; C = 3.0 x 108 m/s; NA = 6.02 x 1023 ions/mole.

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Crystal field theory views the bonding in complexes as arising from electrostatic interaction and considers the effect of the ligand charges on the energies of the metal ion d-orbitals.In this theory, a ligand lone pair is modelled as a point negative charge that repels electrons in the d-orbitals of the central metal ion. The theory concentrated on the resulting splitting of the d-orbitals in two groups with different energies and used that splitting to rationalize and correlate the optical spectra, thermodynamic stability, and magnetic properties of complexes. This energy splitting between the two sets of dorbitals is called the crystal field splitting D.In general, the crystal field splitting energy D corresponds to wavelength of light in visible region of the spectrum, and colours of the complexes can therefore be attributed to electronic transition between the lower-and higher energy sets of d-orbitals.In general, the colour that the we see is complementry to the colour absorbed.Different metal ion have different values of D, which explains why their complexes with the same ligand have different colour.Similarly, the crystal field splitting also depends on the nature of ligands and as the ligand for the same metal varies from H2O to NH3 to ethylenediamine, D for complexes increases. Accordingly, the electronic transition shifts to higher energy (shorter wavelength) as the ligand varies from H2O to NH3 to en, thus accounting for the variation in colour.Crystal field theory accounts for the magnetic properties of complexes in terms of the relative values of and the spin pairing energy P. Small values favour high spin complexes, and large Dvalues favour low spin complexes.Which of the following statements is incorrect?

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A blue colour complex is obtained in the analysis of Fe+3 having formula Fe4[Fe(CN)6]3Let a = oxidation number of iron in the coordination sphere, b = no. of secondary valencies of central iron ion. C = Effective atomic number of iron in the coordination sphere.Then find the value of (c + a − 2 b). Correct answer is '26'. Can you explain this answer?

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The coordination number of a central metal atom in a complex is determined bya)the number of ligands around a metal ion bonded by sigma and pi-bonds bothb)the number of ligands around a metal ion bonded by pi-bondsc)the number of ligands around a metal ion bonded by sigma bondsd)the number of only anionic ligands bonded to the metal ion.Correct answer is option 'C'. Can you explain this answer?

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The coordination number of a central metal atom in a complex is determined bya)the number of ligands around a metal ion bonded by sigma and pi-bonds bothb)the number of ligands around a metal ion bonded by pi-bondsc)the number of ligands around a metal ion bonded by sigma bondsd)the number of only anionic ligands bonded to the metal ion.Correct answer is option 'C'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about The coordination number of a central metal atom in a complex is determined bya)the number of ligands around a metal ion bonded by sigma and pi-bonds bothb)the number of ligands around a metal ion bonded by pi-bondsc)the number of ligands around a metal ion bonded by sigma bondsd)the number of only anionic ligands bonded to the metal ion.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The coordination number of a central metal atom in a complex is determined bya)the number of ligands around a metal ion bonded by sigma and pi-bonds bothb)the number of ligands around a metal ion bonded by pi-bondsc)the number of ligands around a metal ion bonded by sigma bondsd)the number of only anionic ligands bonded to the metal ion.Correct answer is option 'C'. Can you explain this answer?.

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