Bp. Nuccio et al., THE MILLIMETER-WAVE SPECTRUM OF SRCCH(X(2)SIGMA(- CHEMICAL TRENDS IN METAL MONOACETYLIDE SPECIES()) ), Chemical physics letters, 247(3), 1995, pp. 283-288
The pure rotational spectrum of the SrCCH radical (X(2) Sigma(+)) has
been recorded using millimeter/sub-mm direct absorption techniques. Sr
CCH was synthesized in a de discharge by the reaction of strontium vap
or, produced in a Broida-type oven, and acetylene. Seventeen rotationa
l transitions of this molecule were recorded in the range 248-370 GHz
and fine structure splittings resolved. Rotational and spin-rotation p
arameters were determined using a (2) Sigma Hamiltonian. SrCCH appears
to be linear with an ionic structure, as previously suggested. Compar
ison of structural parameters with MgCCH and CaCCH suggest subtle diff
erences in the bonding of these monoacetylide species.