The crystal structure of Mn2[Ru(CN)6]8H2O was determined from three-dimensional X-ray data using integrated Weissenberg photographs in 1971 (Inorg. Chem. 1971, 10, 8). The oxidation state of Mn in this compound is 2+.
a) Sketch the structure of the primary coordination sphere of the above coordination compound. What is the oxidation state of the ruthenium in this complex?
b) Draw the d electron configuration in a crystal field splitting diagram for Ru ion in high spin Mn2[Ru(CN)6]8H2O. Calculate the Crystal Field Stabilization Energy and Total Electron Pairing Energy (, in terms of c and e) for this complex.
c) Predict the magnetic moments (spin-only) for the high spin Ru octahedral complex described in b).
d) Construct a MO energy level diagram showing bonding only for the complex you drew in a). Include appropriate symmetry labels (irreducible representations) and orbital type labels (, *, , *, non-bonding) for all orbitals. Use this MO diagram to explain what the driving force is for this complex to form. Draw the MO diagram using the template below. e) Draw MO pictures (schematic representations) for the molecular orbital eg* in d)
f) In addition to bonding, what other types of bonding (-donor, -acceptor) are expected in the primary coordination sphere of Mn2[Ru(CN)6]8H2O. How would this additional type of bonding affect the bond length of Ru-C and C-N? Explain why.
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