Question

Which of the following complex ions is octachedral ?
A. `[Fe(CN)_(6)]^(4-)`
B. `[Fe(phen)_(3)]^(2+)`
C. `[Fe(C_(2)O_(4))_(3)]^(3-)`
D. All of these

Answer 1

Correct Answer - D
`CN^(-)` ion is a unidentate ligand while `1, 10`, phenanthroline (phen) and `C_(2)O_(4)^(2-)` (oxalate) are bidental ligands. Nearly all six-coordinate complexes are octahedral.