Low‐Temperature Experiments on the Formation of Deuterated C3H+3

Savić, I.; Gerlich, D.

doi:10.1086/427648

Cited by 17 publications

(25 citation statements)

References 36 publications

(58 reference statements)

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“…Given that the stabilization energy of the PO + complex exceeds 10 eV and that the complex contain 10 atoms we can estimate the reaction rate to be of the order of 10 −9 cm 3 s −1 if not larger. This value is larger than what measured, for example, by Gerlich and co-workers [59] for the formation of C 3 HD + , C 3 HD + 2 and C 3 D + 3 and thus radiative association cannot be disregarded as possible formation mechanism. Note that the most stable electronic configuration of O + is a 4 S (that cannot associate directly with PE) therefore the likelihood of this process depends also on the abundance of 2 P oxygen.…”

Section: Thecontrasting

confidence: 56%

On the formation of propylene oxide from propylene in space: gas-phase reactions

Bodo¹,

Bovolenta²,

Simha³

et al. 2019

Theor Chem Acc

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In the present article we have investigated the possibility of forming propylene oxide (PO) from propylene (PE) by bi-molecular reactions. Propylene oxide is the first chiral molecule observed in the interstellar medium, and studying the thermodynamics and kinetics of formation can suggest possible synthetic routes. We have focused our attention on gas phase reactions, and the presence of an environment is discussed in particular for the possibility of forming it by association reactions. In particular, we have considered radical and ion-molecule reactions. Results show that the main gas-phase route to PO formation is represented by ion-molecule reactions which turn out to be compatible with astrophysical conditions, notably: PE + O + and PE + HO + 2. Their final product is not PO, but its ionized variant PO + that can be neutralized by electron capture. The only thermodynamically and kinetically allowed reaction which can directly lead to neutral PO is a collision of PE with a singlet-excited OH + but two competing reactions (leading to PE + and PO +) are thermodynamically favored and thus more plausible in space.

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Section: Thecontrasting

confidence: 56%

On the formation of propylene oxide from propylene in space: gas-phase reactions

Bodo¹,

Bovolenta²,

Simha³

et al. 2019

Theor Chem Acc

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“…The data presented in [21], [22] and here are not yet complete for correctly describing the correlations between different hydrocarbons and their deuterated variants. The relevance for the carbon chemistry of interstellar clouds has been discussed.…”

Section: Discussionmentioning

confidence: 90%

“…Recent calculations [20] indicate a cyclic structure with the lowest states being perturbed by the Jan-Teller effect. Typical experimental results for these reactions are presented in [21] and [22]. The reactivity of the linear and cyclic ions is usually different.…”

Section: Experimental and Typical Resultsmentioning

confidence: 99%

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Some Routes in Forming C[sub 3]H[sub n]+] Ions and Deuterated Variants under Interstellar Conditions

Savić¹,

Gerlich²

2006

AIP Conference Proceedings

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Laboratory experiments on hydrogenation and deuteration of C 3 + , C 3 H + and C 3 H 2 + in collisions with H 2 and HD have been performed from room temperature down to 15 K using a 22-pole ion-trap. At room temperature C 3 + reacts slowly with H 2 but the reactivity increases with decreasing temperature.. The new reaction rate coefficients are recommended to be included in astrophysical databases. Nonetheless it is still unclear how to explain the large abundance of C 3 H 2 and larger hydrocarbons and their deuterated variants observed in cold interstellar clouds.

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“…Other recent results obtained for deuteration of ions can be found in [21,24,36,37]. They demonstrate that isotope enrichment at low temperatures is not only a unique astrochemical probe but it provides deep insight into molecular structures, reaction dynamics and especially the consequences of nuclear spin conservation and its chemical consequences.…”

Section: Deuterationmentioning

confidence: 92%

Laboratory astrochemistry: studying molecules under inter- and circumstellar conditions

Gerlich

Smith

2005

Phys. Scr.

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In this paper, we outline recent developments in and the growing need for laboratory astrochemical measurements. After a short review on experimental methods, we focus primarily upon the utility of multi-electrode ion trapping methods for addressing key problems in reaction dynamics and their applications towards gaining a better understanding of the physicochemical driving forces behind compositional development in interstellar and circumstellar environments. Temperature variable trapping techniques, combined with lasers and molecular beams are unique tools for studying state specific reactions, for ion spectroscopy and for investigating the structure and stability of complex charged objects as a function of their internal energy. Particular emphasis is given to reactions with hydrogen atoms and molecules, H-D exchange leading to isotopic fractionation, problems in hydrocarbon ion chemistry and association chemistry in rarefied environments. In the outlook, we discuss the future needs in astrochemistry in order to pave the way towards understanding the next generation of sophisticated astronomical observations and to prepare for them.

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Low‐Temperature Experiments on the Formation of Deuterated C₃H⁺₃

Cited by 17 publications

References 36 publications

On the formation of propylene oxide from propylene in space: gas-phase reactions

On the formation of propylene oxide from propylene in space: gas-phase reactions

Some Routes in Forming C[sub 3]H[sub n]+] Ions and Deuterated Variants under Interstellar Conditions

Laboratory astrochemistry: studying molecules under inter- and circumstellar conditions

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