helpinghands9403

1. Were any spin-allowed d-d transitions not measured in your absorption spectra because they fell outside of the measurable range of wavelengths? If so, estimate the wavelength maxima of the missing band(s). It may help to consult the literature when considering whether any non-measured spin-allowed d-d transitions were at lower or higher energy than the measured spectral window.
2. Four coordinate nickel complexes can have another geometry other than tetrahedral. Name that geometry, and explain why the absorption spectrum you took strongly suggests a tetrahedral geometry, as opposed to the other possible option. Hint: Think about the allowedness of transitions in the two geometries.

3. Assign the d-d transitions (using appropriate term symbols) of (Bu4N)2[NiBr4] and [Ni(NH3)6]Br2.

Suppose that you first titrated 25.0 mL of 0.500 M HCL with 0.500M NaOH and then 25.0 mL of 0.500 M of a weark acid HA with 0.500M NaOH.How would the titration curves compare at 10 or 15 ml of NaOH beyond the equivalence points? Explain.