Fourier Transform Microwave Spectroscopy of CuCCH (X1Σ^+)

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Mini-Symposium: Metal Containing Molecules

Scientific paper

The rotational spectrum of CuCCH (X1Σ^+) has been measured using Fourier transform microwave (FTMW) spectroscopy. This work is the first gas-phase spectroscopic study of this molecule. The species was produced using Discharge Assisted Laser Ablation Spectroscopy (DALAS) in a supersonic jet expansion with HCCH as the precursor molecule. Four rotational transitions (J = 1 → 0, 2 → 1, 3 → 2, and 4 → 3) have been measured for the 63CuCCH and 65CuCCH isotopologues in the range 8-33 GHz. Copper quadrupole splittings have been resolved in both species. The data have been analyzed, and rotational and hyperfine constants determined. Measurements of the carbon-13 and deuterium isotopologues are currently being conducted to establish a precise structure for CuCCH. Compounds of the form CuCCR play an important role in organic synthesis.

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