# ZEKE SPECTROSCOPY OF ALUMINUM AND GALLIUM COMPLEXES OF PIPERIDINE

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 Title: ZEKE SPECTROSCOPY OF ALUMINUM AND GALLIUM COMPLEXES OF PIPERIDINE Creators: Bhowmik, Paragranjita; Li, Shenggang; Sohnlein, Bradford R.; Fuller, Jason F.; Wang, Xu; Yang, Dong-Sheng Issue Date: 2004 Publisher: Ohio State University Abstract: The Al and Ga complexes were produced by reactions of laser-vaporized metal atoms with piperidine $(C_{5}H_{11}N)$ and characterized by pulsed field ionization-zero electron kinetic energy (PFI-ZEKE) spectroscopy. For $Al-C_{5}H_{11}N$, the adiabatic ionization potential was measured to be $37060 cm^{-1}$, and vibrational frequencies were determined for the $Al^{+}-N$ stretching $(238 cm^{-1}), Al^{+}/Al-N-C$ bending $(84/105 cm^{-1})$ and piperidine-based vibrations (300 and $464 cm^{-1}$). By comparing the ZEKE measurements with ab initio calculations, the neutral and ionic aluminum complexes were determined to be in $C_{s}$ symmetry with Al binding to the nitrogen of the chair-like piperidine ring. For the gallium complex, the ZEKE spectrum shows an ionization potential of $37529 cm^{-1}$, a $Ga^{+}-N$ stretching frequency of $176 cm^{-1}$ and a $Ga^{+}-N-C$ bending frequency of $70 cm^{-1}$. Description: Author Institution: Department of Chemistry, University of Kentucky URI: http://hdl.handle.net/1811/21157 Other Identifiers: 2004-FC-03