GAS-PHASE INORGANIC-CHEMISTRY - LASER SPECTROSCOPY OF CALCIUM AND STRONTIUM MONOPYRROLATE MOLECULES

The gas-phase calcium and strontium monopyrrolate molecules were synthesized by the direct reaction between the metal vapor and pyrrole. The electronic and vibrational structures of these molecules were probed by low-resolution laser techniques. The spectra are consistent with a ring-bonding, ionic, M+(C4H4N)- structure of pseudo-C5V symmetry. The assignments of the Ã2E1(1/2)-X̃2A1, Ã2E1(3/2)-X̃2A1, and B̃2A1-X̃2A1 electronic transitions were made by analogy to the isoelectronic metal monocyclopentadienide molecules, CaC5H5 and SrC5H5. © 1990 American Chemical Society.