electronic spectroscopy Flashcards
the energy associated with transitions between electronic states in molecules correspond tooo
UV
VISIBLE
absorption in the visible region gives what
gives things colour!!
main types of electronic transitions that allow colour
- between d orbitals in transition metal ions
- between an orbital in a ligand and an orbital in a metal ion
- between 🥧 orbitals in conjugated organic compounds
what is colour the result of
energy from the VISIBLE light region of EMS being absorbed due to corresponding to the energy gap between 2 electronic energy levels
spectrophotometers
specs that measure absorbance of UV VIS radiation at a single wavelength
both atoms and molecules have electrons in quantised energy levels meaning both haveeee
electronic absorption spectra
in molecules how are electronic transitions seen
an electron in a lower energy occupied molecular orbital is promoted to a higher energy unoccupied or partially occupied molecular orbital