  Propargyl alcohol (HC2CH2OH, PA) has yet to be observed in the interstellar
medium (ISM) although one of its stable isomers, propenal (CH2CHCHO), has
already been detected in Sagittarius B2(N) with the 100-meter Green Bank
Telescope in the frequency range $18-26$ GHz. In this paper, we investigate the
formation of propargyl alcohol along with one of its deuterated isotopomers,
HC2CH2OD(OD-PA), in a dense molecular cloud. Various pathways for the formation
of PA in the gas and on ice mantles surrounding dust particles are discussed.
We use a large gas-grain chemical network to study the chemical evolution of PA
and its deuterated isotopomer. Our results suggest that gaseous HC2CH2OH can
most likely be detected in hot cores or in collections of hot cores such as the
star-forming region Sgr B2(N). A simple LTE (Local thermodynamic equilibrium)
radiative transfer model is employed to check the possibility of detecting PA
and OD-PA in the millimeter-wave regime. In addition, we have carried out
quantum chemical calculations to compute the vibrational transition frequencies
and intensities of these species in the infrared for perhaps future use in
studies with the James Webb Space Telescope (JWST).
