The pure rotational spectrum of the SrCCH radical (X2Σ+) has been recorded using millimeter/sub-mm direct absorption techniques. SrCCH was synthesized in a dc discharge by the reaction of strontium vapor, produced in a Broida-type oven, and acetylene. Seventeen rotational transitions of this molecule were recorded in the range 248-370 GHz and fine structure splittings resolved. Rotational and spin-rotation parameters were determined using a 2Σ Hamiltonian. SrCCH appears to be linear with an ionic structure, as previously suggested. Comparison of structural parameters with MgCCH and CaCCH suggest subtle differences in the bonding of these monoacetylide species.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry