Laboratory detection and rotational spectroscopy of <i>trans</i>-HNSO: implications for astronomical observations.

ABSTRACT: Sulfur-bearing molecules are central to interstellar chemistry, yet their observed abundances in the gas phase remain far below cosmic expectations in dense interstellar regions. Mixed N-S-O species such as thionylimide (HNSO) are particularly relevant, as they incorporate three key biogenic elements. The cis conformer of HNSO has recently been detected in the Galactic Center cloud G+0.693-0.027, but no high-resolution data for the higher energy conformer (trans-HNSO) had been available until now. We report the first laboratory detection and rotational spectroscopic characterization of trans-HNSO. Spectra were recorded with the Center for Astrochemical Studies Absorption Cell (CASAC) free-space spectrometer employing a hollow-cathode discharge source, yielding 104 assi

SUBMITTER: Lattanzi V 

PROVIDER: S-EPMC12708892 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature