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JEE MainChemistryCoordination Compounds

A coordination compound has the empirical formula CoCl₃ en 2NH₃ (where en = ethylenediamine). When one mole of this compound is treated with excess AgNO₃ solution, exactly one mole of AgCl precipitates. The total number of stereoisomers exhibited by the complex cation is ________

Correct answer

4

Step-by-step solution

The precipitation of 1 mole of AgCl per mole of the compound indicates that only one chloride ion is present in the ionization sphere. The remaining ligands (one bidentate 'en', two monodentate NH₃ , and two monodentate Cl^- ) are inside the coordination sphere, giving a coordination number of 6. The formula of the complex is [ Co(en)(NH₃)₂Cl₂]Cl . The complex cation is [ Co(en)(NH₃)₂Cl₂]^+ , which is an octahedral complex of the type [ M(AA)b₂c₂ ] . We determine its stereoisomers by considering the relative positi

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