The absorption spectra of solutions containing Br2 are solvent dependent. When elemental bromine is dissolved in nonpolar solvents such as hexane, a single absorption band in the visible spectrum is observed near 500 nm. When Br2 is dissolved in methanol, however, this absorption band shifts and a new band is formed.
a. Account for the appearance of the new band.
b. Is the 500 nm band likely to shift to a longer or shorter wavelength in methanol? Why?
In your answers, you should show clearly how appropriate orbitals of Br2 and methanol interact.
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