Structural and bonding properties of BS−/0 and BS3−/0†
Anion photoelectron spectroscopy and theoretical calculations were used to investigate the structural, electronic, and bonding properties of BS− and BS3−. Vibrationally resolved photoelectron spectra of BS− at 355 nm and 266 nm were obtained. The electron affinity of BS is determined to be 2.32 ± 0.05 eV. The stretching vibrational frequencies of BS− and BS were measured to be 968 cm−1 and 1210 cm−1, respectively. The results indicate that the B–S bond in BS−/0 can be characterized as a triple bond. The B–S bond in neutral BS is stronger than that in anionic BS−. The most stable isomer of BS3− has a C2v symmetric planar structure with the B atom at the center interacting with the three S atoms, while that of neutral BS3 has a S–B–S–S bent structure.