Laboratory spectroscopy of 1,2-propanediol at millimeter and submillimeter wavelengths

Abstract

Ethanediol is one of the largest complex organic molecules detected in space thus far. It has been found in different types of molecular clouds. The two propanediol isomers are the next larger diols. Hence, they are viable candidates to be searched for in space. We wish to provide sufficiently large and accurate sets of spectroscopic parameters of 1,2-propanediol to facilitate searches for this molecule at millimeter and longer submillimeter wavelengths. We recorded rotational spectra of 1,2-propanediol in three wide frequency windows between 38 and 400~GHz. We made extensive assignments for the three lowest energy conformers to yield spectroscopic parameters up to eighth order of angular momentum. Our present data will be helpful for identifying 1,2-propanediol at moderate submillimeter or longer wavelengths with radio telescope arrays such as ALMA, NOEMA, or EVLA. In particular, its detection with ALMA in sources, in which ethanediol was detected, appears to be promising.

arXiv comment8 pages, 3 figures, Astron. Astrophys., accepted

References in corpus (6)

• Complex organic molecules in the interstellar medium: IRAM 30 m line survey of Sagittarius B2(N) and (M)
• Detection of the simplest sugar, glycolaldehyde, in a solar-type protostar with ALMA
• The largest oxigen bearing organic molecule repository
• First results from the CALYPSO IRAM-PdBI survey. II. Resolving the hot corino in the Class 0 protostar NGC 1333-IRAS2A
• Weak maser emission of methyl formate toward Sagittarius B2(N) in the Green Bank Telescope PRIMOS Survey
• The quest for complex molecules in space: Laboratory spectroscopy of n-butyl cyanide, n-C4H9CN, in the millimeter wave region and its astronomical search in Sagittarius B2(N)

Cited by in corpus (9)

• Rotational spectroscopy of methyl mercaptan CH${}_3$${}^{32}$SH at millimeter and submillimeter wavelengths
• Laboratory spectroscopic study and astronomical detection of vibrationally excited n-propyl cyanide
• Rotational spectra of isotopic species of methyl cyanide, CH${}_3$CN, in their $v_8=1$ excited vibrational states
• Reexploring Molecular Complexity with ALMA: Insights into chemical differentiation from the molecular composition of hot cores in Sgr B2(N2)
• Deuterated methyl mercaptan (CH${}_3$SD): Laboratory rotational spectroscopy and search toward IRAS 16293-2422 B
• Rotational spectrum of isotopic methyl mercaptan, (13)CH3SH, in the laboratory and towards Sagittarius B2(N2)
• High Resolution Laboratory Spectroscopy
• Rotational spectroscopy of isotopic species of methyl mercaptan at millimeter and submillimeter wavelengths: CH${}_3$${}^{34}$SH
• Millimeter-wave spectroscopy of the ${}^{13}$CH${}_3$OD isotopic species of methyl alcohol