title: Photoelectron spectroscopic and computational study of the PtMgH3,5(-) cluster anions.
abstract: The two cluster anions, PtMgH3(-) and PtMgH5(-), were studied by photoelectron spectroscopy and theoretical calculations. Experimentally-determined electron affinity (EA) and vertical detachment energy (VDE) values were compared with those predicted by our computations; excellent agreement was found. The calculated structures of PtMgH3(-) and PtMgH3 both exhibit η2-bonded H2 moieties. Activation of these H2 moieties is implied by the elongation of their bond lengths relative to the bond length of free H2. The calculated structures of PtMgH5(-) and PtMgH5 both exhibit all-hydrogen, five-member, σ-aromatic rings. These attributes are responsible for this anion's special stability.
authors.affiliation: Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, USA. kbowen@jhu.edu.
authors.forename: Xinxing
authors.initials: X
authors.lastname: Zhang
authors.forename: Gerd
authors.initials: G
authors.lastname: Ganteför
authors.forename: Anastassia N
authors.initials: AN
authors.lastname: Alexandrova
authors.forename: Kit
authors.initials: K
authors.lastname: Bowen