Abstract
The rotational spectra of AgCCH and AuCCH were measured using Fourier-transform microwave (FTMW) and source-modulated millimeter-wave spectrometers. For the FTMW measurements, AgCCH and AuCCH were generated in supersonic jets using the pulse-discharge reaction of laser-ablated metal atoms with HCCH diluted with Ar. For the millimeter-wave measurements, these molecules were generated in a free-space cell by sputtering of metal sheets. Rotational transitions were measured for 107AgCCH, 109AgCCH, 107AgCCD, 109AgCCD, AuCCH, and AuCCD. The r0 structures of both molecules were obtained from the rotational constants. The quadrupole parameters of the Au and D nuclei were compared with those of other metal monoacetylides.
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