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Explain the following giving an example in each case:(i) Linkage isomerism(ii) An outer orbital complex(iii) A bidentate ligand |
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Answer» (i) Linkage isomerism: The isomers which have same molecular formula but differ in the linkage of ligand atom to the central metal atom are called linkage isomers, e.g., [Co(NH3 )5 NO2 ]Cl2 and [Co(NH3)5ONO]Cl2 Pentaamminenitrito–N–Cobalt (III) chloride pentaamminenitrito–O–Cobalt (III) chloride (ii) Outer orbital complex: When ns, np and nd orbitals are involved in hybridisation, outer orbital complex is formed, e.g., [CoF6 ]2- in which cobalt is sp3 d2 hybridised. (iii) Bidentate ligand: When a ligand is bound to a metal ion through two donor atoms it is said to be bidentate ligand, e.g., H2N—CH2 —CH2 —NH2 (ethane–1, 2–diamine, C2 O2-4 (oxalate), etc. |
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