Metal carbonyls and isocyanides have characteristic peaks in infrared spectra. While the energies are useful in a qualitative determination of relative bond strengths, a more quantitative approach is needed to cross-compare similar complexes. Using a harmonic oscillator approximation, it is possible to determine the effective force constants of carbon-oxygen and carbon-nitrogen bonds. This allowed me to show that negatively charged bis(diphenylphosphinomethyl)diphenylborate used in our laboratory is a better donor than its neutral analogue 1,2-bis(diphenylphosphino)ethane.
"Force Constants of Coordinated CO and β-amino Substituted Isocyanides Using Infrared Spectroscopy,"
Macalester Journal of Physics and Astronomy: Vol. 2
, Article 1.
Available at: http://digitalcommons.macalester.edu/mjpa/vol2/iss1/1