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Updated: Apr 23, 2026

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
Published on: February 14, 2014
H₂-AgCl: a spectroscopic study of a dihydrogen complex
G S Grubbs1, Daniel A Obenchain2, Herbert M Pickett2
1Department of Chemistry, Missouri University of Science and Technology, 400 W. 11th St., Rolla, Missouri 65409, USA.
Abstract:
H2-AgCl has been observed on a Fourier transform microwave spectrometer equipped with laser ablation source and determined to be a dihydrogen complex. Transitions up to J = 3-2 have been measured and analyzed for four isotopologues of the complex containing ortho and para H2. The ortho and para spin states have been included in one fit, a deviation from the typical H2 complex. Rotational constants B and C, centrifugal distortion constants Δ(J) and Δ(JK), nuclear electric quadrupole coupling constants χ(aa), χ(bb), and χ(cc) for (35)Cl and (37)Cl have been fit for both spin states while nuclear spin-nuclear spin constants D(aa), D(bb), and D(cc), and nuclear spin-rotation constant C(aa) have been reported for the ortho spin state. Quantum chemical calculations predict a strong bonding interaction and the strength of the complex has been related to reported χ(aa) and Δ(J) values amongst a host of comparable species, including the AgCl monomer itself. Bond lengths have been determined for Ag-Cl, Ag-H2 center-of-mass, and H-H and are reported.
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