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Photoelectron spectroscopic and computational study of the PtMgH3,5(-) cluster anions.

  • Author(s): Zhang, Xinxing
  • Ganteför, Gerd
  • Alexandrova, Anastassia N
  • Bowen, Kit
  • et al.
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.

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