Molecular shape and polarity

Molecular shape and polarity - The Spectrochemical Series...

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The Spectrochemical Series by Megan Lawless Lab Instructor: Mr. Hoch November 30, 2007
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Results and Discussion: The purpose of this lab was to synthesize and purify a cobalt complex and the determine the identities of each of five cobalt complexes. Complex A was made during week one using a cobalt salt, ammonium chloride, hydrogen peroxide, and hydrochloric acid. During week two more hydrochloric acid was added and the complex was vacuum filtered. The reactions used in this experiment were not supplied. Absorbance measurements were made for all five complexes (Table 1). Table 1. Absorption measurements for cobalt complexes Complex Wavelength of Maximum Absorbance (nm) Complex A 531.14 Complex B 478.18 Complex C 510.64 Complex D 547.87 Complex E 493.72 The identities of the complexes were found by looking at the wavelength and the spectrochemical series. A weaker field ligand will produce less splitting between the d-electrons. Less splitting means that less energy is needed to promote and electron to a higher energy level.
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  • Fall '05
  • Chemistry, Mole, Wavelength, spectrochemical series, cobalt complexes Complex Complex

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