Which of these complexes is expected to be colourless… | StemPy Lab

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Which of these complexes is expected to be colourless… | StemPy Lab

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Which of these complexes is expected to be colourless in solution?

ChemistryMediumHigh School (11–12)Coordination Compounds › Bonding: Valence Bond and Crystal Field Theory A-Level IB

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Which of these complexes is expected to be colourless in solution?

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← Cr³⁺ forms four octahedral complexes: with Cl⁻, with H₂O, with NH₃ and with CN⁻. Which complex absorbs light of the shortest wavelength?A student says that the high spin ion [Mn(H₂O)₆]²⁺ has a CFSE of -2.0 Δo, because all five d electrons go into the t_2g set. What is the mistake? →

More onCoordination Compounds › Bonding: Valence Bond and Crystal Field Theory

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An octahedral d⁴ ion is first bound to a weak ligand and shows 4 unpaired electrons. A stronger…Hard
Seven d electrons sit in a strong octahedral field, so the complex is low spin, with Δo = 190…Medium
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Cr³⁺ forms four octahedral complexes: with Cl⁻, with H₂O, with NH₃ and with CN⁻. Which complex…Medium
The tetrahedral ion [FeCl₄]²⁻ contains iron(II). How many unpaired electrons does it have?Medium

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Two complexes of the same metal ion form at 298 K…Medium
Four aqua complexes are [Sc(H₂O)₆]³⁺, [Zn(H₂O)₆]²⁺, [Cr(H₂O)₆]³⁺ and [Co(H₂O)₆]²⁺…Medium
The complex of a d¹ ion absorbs red light of wavelength 640 nm…Easy
A d² ion forms an octahedral complex with Δo = 270 kJ/mol…Hard

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