title: Infrared spectra and theoretical calculations of KH and (KH)2 in solid hydrogen.
abstract: A matrix isolation IR study of laser-ablated potassium atom reactions with H2 has been performed in solid molecular hydrogen. The KH molecule and (KH)2 cluster were identified by infrared spectra with isotopic substitution (HD and D2) and by comparison to frequencies calculated using density functional theory. In para-hydrogen, the sharp KH absorption suggests dihydrogen complex formation with the ionic KH molecule, which is also characterized by an absorption at 4095 cm(-1). The highly ionic rhombic (KH)2 molecule is formed by dimerization and trapped in solid hydrogen. Calculations at the CCSD(T) level of theory show the increasing ionic character and decreasing stability for the (MH)2 molecule series from Li to Cs.
authors.affiliation: Department of Chemistry, P. O. Box 400319, University of Virginia, Charlottesville, Virginia 22904-4319, USA.
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Wang
authors.forename: Lester
authors.initials: L
authors.lastname: Andrews