Knowledge Bank

Vibrationally resolved spectra of the aluminum-phosphine and -arsine complexes were measured using ZEKE spectroscopy. The ZEKE spectrum of $Al-P(CH3)3$ reveals the vibrational energy levels of low-frequency modes in the cationic and neutral species. These modes include the symmetric $Al+-P$ stretching $(326cm-1)$ and $Al+-P-C$ bending $(76cm-1)$ in the ion and the symmetric Al-P-C bending $(71cm-1)$ in the neutral. The spectrum of $Al-As(CH3)3$ displays a major progression associated with the $Al+-As-C$ bending. Other transitions are also evident in the spectrum. Analysis is ongoing.