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Formulae of named complexes

Short answer

i) K₃[Fe(CN)₆] ii) [Al(C₂O₄)₃]³⁻ iii) [Cr(en)₃]Cl₃ iv) [Cr(C₆H₆)₂].

Write the formulae of following: i) Potassium hexacyanoferrate (III) ii) Trioxalatoaluminate (III) ion iii) Tris(ethylenediamine) chromium (III) chloride iv) Bis(benzene) chromium(0)

i) Potassium hexacyanoferrate(III): K₃[Fe(CN)₆] ii) Trioxalatoaluminate(III) ion: [Al(C₂O₄)₃]³⁻ iii) Tris(ethylenediamine)chromium(III) chloride: [Cr(en)₃]Cl₃ iv) Bis(benzene)chromium(0): [Cr(C₆H₆)₂]

Charges are checked: (i) 3(+1) + (+3) + 6(−1) = 0; (ii) +3 + 3(−2) = −3; (iii) +3 + 3(−1) = 0; (iv) 0 + 0 = 0.

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