Chemistry 401

Intermediate Inorganic Chemistry

University of Rhode Island

Exam 3

December 8, 2006
open notes, open book

1. Find the point group for the following species: XeO3, hexacarbonylvanadium(0), and tris(2,2'-bipyridine)ruthenium(II) ion.

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2. Find the LFSE in terms of Dq and P and the magnetic moment in terms of Bohr-magnetons for: fac-tribromotrichloroferrate(II) ion, hexacyanoferrate(III) ion, bis(η4-1,5-cyclooctadiene)nickel(0).

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3. Consider the reactions:

[MF6]4–(aq) + 6 OH(aq) → [M(OH)6]4–(aq) + 6 F(aq)      β is large

[M(H2O)6]2+(aq) + 6 OH(aq) → [M(OH)6]4–(aq) + 6 H2O(l)      β is small

Place hydroxide in the spectrochemical series and explain your reasoning.

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4. Use the EAN rule to predict the stability of the following: trans-dichlorotetrakis(triphenylphosphine)nickel(II), chlorotris(triphenylphosphine)rhodium(I), [PtCl3(CH2=CH2)].

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5. 10Dq is found to be 17400 cm–1 for [Cr(H2O)6]3+. a) Predict λmax in units of nm for the lowest energy d-d transition. b) Will this wavelength be longer, shorter, or the same if all of the water ligands are substituted with fluoride? Explain.

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