Laboratory Detection of Thiocyanic Acid HSCN

Brünken, Sandra; Yu, Zhenhong; Gottlieb, C. A.; McCarthy, Michael; Thaddeus, P.

doi:10.1088/0004-637x/706/2/1588

Cited by 29 publications

(27 citation statements)

References 23 publications

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“…To check the adequacy of this procedure, we have applied it to quasi-linear NCSH and HNCS molecules of known rotational spectroscopy (Brünken et al 2009b;Beard & Dailey 1950;Kewley et al 1963). The resultant molecular constants were acceptably close to experimental values with B 0 and C 0 deviations of −0.6% for NCSH and −0.3% for HNCS.…”

Section: Microwave Spectroscopymentioning

confidence: 77%

A THEORETICAL STUDY ON THE INTERSTELLAR SYNTHESIS OF H₂NCS⁺AND HNCSH⁺CATIONS

Gronowski

Kołos

2014

ApJ

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(kida.uva.2011), appended with 7 sulfur-bearing molecules and 48 corresponding reactions, has been applied to model the evolution of HNCS, NCSH, and their cationic precursors in a quiescent molecular cloud. Based on the model and on spectroscopic predictions, for an object like TMC-1, we expect the total intensity of H 2 NCS + microwave lines to be comparable to that observed for HSCN. Theoretically derived molecular parameters, of interest for radio spectroscopy, are given for the most stable cations sharing the H 2 NCS + stoichiometry.

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Section: Microwave Spectroscopymentioning

confidence: 77%

A THEORETICAL STUDY ON THE INTERSTELLAR SYNTHESIS OF H₂NCS⁺AND HNCSH⁺CATIONS

Gronowski

Kołos

2014

ApJ

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“…However, no HCNO emission was found at any position, with rms values between 5-14 mK. Although a line was observed near 91.751 GHz, it has been recently identified as a transition arising from HSCN (see Halfen et al 2009;Brünken et al 2009b).…”

Section: Resultsmentioning

confidence: 95%

The puzzling behavior of HNCO isomers in molecular clouds

Marcelino

Brünken

Cernicharo

et al. 2010

A&A

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Context. Isocyanic acid (HNCO) has been observed in different physical environments in the interstellar medium (ISM) and in external galaxies. HNCO has several metastable isomers with a ground electronic singlet state: HOCN, HCNO, and HONC. The recent detection of fulminic acid (HCNO) in prestellar and protostellar cores and cyanic acid (HOCN) in warm molecular sources (e.g. hot cores) in the Galactic center proves that these species could also be common constituents of the ISM. Aims. To shed some light on the possible formation pathways of these species, we searched for HCNO in the sources where HOCN has been previously detected and vice versa. We have also included the low-mass protostar IRAS 16293-2422, where HNCO is found to be prominent. Methods. Using the new EMIR receivers at the IRAM 30-m telescope, we performed deep searches for three rotational transitions of HOCN and four of HCNO. Results. We report the detection of HOCN in four sources -three dense cores and the lukewarm corino L1527 -where HCNO has been previously observed. HOCN is tentatively detected toward the protostellar binary IRAS 16293-2422. However, HCNO has been detected neither in this source nor in the sources of the Galactic center where HOCN has been previously reported. The derived abundance ratios HCNO/HOCN are close to unity in quiescent clouds, while they are less than 0.01-0.1 in warm clouds. We attempt to explain these results by using both gas-phase and gas-grain chemical models.

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“…These studies might also be extended to related isomeric families. The higher energy isomers of the insterstellar molecule HNCS, which is isoelectronic to HNCO, have recently been detected in the laboratory (HSCN; Brünken et al 2009b), (HCNS and HSNC; McCarthy, in preparation), and HSCN has now also been detected in Sgr B2 (Halfen et al 2009). …”

Section: Discussionmentioning

confidence: 99%

Interstellar HOCN in the Galactic center region

Brünken¹,

Беллоче

Martín

et al. 2010

A&A

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Aims. Our aim is to confirm the interstellar detection of cyanic acid, HOCN, in the Galactic center clouds. It has previously been tentatively detected only in Sgr B2(OH). Methods. We used a complete line survey of the hot cores Sgr B2(N) and (M) in the 3 mm range, complemented by additional observations carried out with the IRAM 30 m telescope at selected frequencies in the 2 mm band and towards four additional positions in the Sgr B2 cloud complex in the 2 and 3 mm bands. The spectral survey was analysed in the local thermodynamical equilibrium approximation (LTE) by modeling the emission of all identified molecules simultaneously. This allowed us to distinguish weak features of HOCN from the rich line spectrum observed in Sgr B2(N) and (M). Lines of the more stable (by 1.1 eV) isomer isocyanic acid, HNCO, in these sources, as well as those of HOCN and HNCO towards the other positions, were analysed in the LTE approximation as well. Results. Four transitions of HOCN were detected in a quiescent molecular cloud in the Galactic center at a position offset in (RA, Dec) by (20 , 100 ) from the hot core source Sgr B2(M), confirming its previous tentative interstellar detection. Up to four transitions were detected toward five other positions in the Sgr B2 complex, including the hot cores Sgr B2(M), (S), and (N). A fairly constant abundance ratio of ∼0.3−0.8% for HOCN relative to HNCO was derived for the extended gas components, suggesting a common formation process of these isomers.

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Laboratory Detection of Thiocyanic Acid HSCN

Cited by 29 publications

References 23 publications

A THEORETICAL STUDY ON THE INTERSTELLAR SYNTHESIS OF H₂NCS⁺AND HNCSH⁺CATIONS

A THEORETICAL STUDY ON THE INTERSTELLAR SYNTHESIS OF H₂NCS⁺AND HNCSH⁺CATIONS

The puzzling behavior of HNCO isomers in molecular clouds

Interstellar HOCN in the Galactic center region

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Laboratory Detection of Thiocyanic Acid HSCN

Cited by 29 publications

References 23 publications

A THEORETICAL STUDY ON THE INTERSTELLAR SYNTHESIS OF H2NCS+AND HNCSH+CATIONS

A THEORETICAL STUDY ON THE INTERSTELLAR SYNTHESIS OF H2NCS+AND HNCSH+CATIONS

The puzzling behavior of HNCO isomers in molecular clouds

Interstellar HOCN in the Galactic center region

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A THEORETICAL STUDY ON THE INTERSTELLAR SYNTHESIS OF H₂NCS⁺AND HNCSH⁺CATIONS

A THEORETICAL STUDY ON THE INTERSTELLAR SYNTHESIS OF H₂NCS⁺AND HNCSH⁺CATIONS