. Explain the following giving an example in each case


Explain the following giving an example in each case

(i) Linkage isomerism        (ii) An outer orbital complex

(iii) A bidentate ligand

Best 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 sp3dhybridised

(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, C2O4 2- (oxalate), etc

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