In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of `Delta_o` be the highest?A. `[Co(CN)_(6)]^(3-)`B. `[Co(C_(2) O_(4))_(3)]^(3-)`C. `[Co(H_(2)O)_(6)]^(3+)`D. `[Co(NH_(3))_(6)]^(3+)`

In which of the following octahedral complexes of Co (at. no. 27), wil

1.	In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of `Delta_o` be the highest?A. `[Co(CN)_(6)]^(3-)`B. `[Co(C_(2) O_(4))_(3)]^(3-)`C. `[Co(H_(2)O)_(6)]^(3+)`D. `[Co(NH_(3))_(6)]^(3+)`
Answer» Correct Answer - A CFSE ( crystal field splitting energy ) for octahedral complex , `Delta _(0) ` depands on the the strength of negative ligand . Spectrochemically, it has been found that the strength of splitting is as follows : ` CO gt underline ( CN^(-)) gt NO_(2)^(-) gt underline (NH_(3))gt py gt ` ` NCS ^(-) H_(2) O gt O_(2) gt Ox^(2-) gt OH^(-) gt F^(-) gt ` ` Cl ^(-) gt SCN^(-) gt S^(2-) gt Br^(-) gt I^(-)` therefore , magnitude of ` Delta _(0) ` will be highest in case of ` [Co (CN)_(6) ]^(3-)`.

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In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of `Delta_o` be the highest?A. `[Co(CN)_(6)]^(3-)`B. `[Co(C_(2) O_(4))_(3)]^(3-)`C. `[Co(H_(2)O)_(6)]^(3+)`D. `[Co(NH_(3))_(6)]^(3+)`

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