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Question
Explain with two examples of the following:
Ligand
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Solution
A ligand is an ion or molecule that has at least one lone pair of electrons and can donate it to a central metal atom or ion to form a coordinate bond. Ligands act as electron donors in the formation of coordination complexes. These may be simple ions such as Cl−, small molecules such as H2O or NH3, larger molecules such as H2NCH2CH2NH2 or N(CH2CH2NH2)3 or even macromolecules, such as proteins.
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Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complex:
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(iv) \[\ce{[Ni(NH3)4Cl2]}\]
Match the complex ions given in Column I with the colours given in Column II and assign the correct code:
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| A. \[\ce{[Co(NH3)6]^{3+}}\] | 1. Violet |
| B. \[\ce{[Ti(H2O)6]^{3+}}\] | 2. Green |
| C. \[\ce{[Ni(H2O)6]^{2+}}\] | 3. Pale blue |
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| 5. Blue |
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Coordination number
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Heteroleptic
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Statement II: Complex [Co(NH3)6]3+ has only one kind of ligands but [Co(NH3)4Cl2]+ has more than one kind of ligands.
In the light of the above statements, Choose the correct answer form the options given below.
