Photoionization of Propylene at 1236 Å. Reactions of C3D6+ with Added Alkanes

Gorden, R.; Doepker, Richard D.; Ausloos, P.

doi:10.1063/1.1726528

Cited by 29 publications

(21 citation statements)

References 26 publications

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“…Reactions occurring at hi g her pressures could not be inves ti gated quantitative ly due to th e co mplexity of the res ultin g spectrum. The direct observati on of the D2 tran sfer reac tion involvin g th e Cr;Ot2 ion verifies th e mec hani s m proposed ea rli er in thi s labora tory [32] to account for propane formation in photoionized propyle ne, and th e ion-pair yie ld of 0.19 deriv ed in thi s study co mpares well with the value of 0.14 reported for CIHH formation in photoionized C IH 6. Recent mass spectro metri c experim e nts from thi s laboratory [33] have confir med th at th e analogo us reaction sc he me also occ urs in i-C4 HH a nd i-C 4 OH.…”

Section: B Reactions Occurring At Higher Pressuressupporting

confidence: 71%

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Photoionization of propylene, cyclopropane, and ethylene. The effect of internal energy on the bimolecular reactions of C2H+4 and C3H+6

Sieck¹,

Ausloos²

1972

J. RES. NATL. BUR. STAN. SECT. A.

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Th e ion·mo lec u le c he mi s t ry occ urrin g in photo ion ized eth yle ne . prop yle ne a nd cyc lop rop an e ha s bee n in ves tiga ted in th e N BS hi g h press ure ma ss s pect rome te r. Empha s is has bee n pl ace d on d ete rmin ing th e ove ra ll e ffe c t of int e rn a l e xc it ati o n o n th e abso lut e ra te c oe ffi c ie nt s for th e va ri o us re ac ti o ns. T hi s was acco mpli s he d by c o mpari ng th e be h av ior fo und wh e n ioni za ti on was in du ced by photon abso rpti o n at th e ion iza ti o n thres hold with th a t fo un d at hi ghe r photo n e ne rgies. T he va lu es fo r th e a bso lute rat e coe ffic ie nt s fo r th e formation of e xc it ed co mpo und io ns at variou s photo n e ne rgies we re a s foll o ws (unit s of 10-'0 c m"/ mol ec ul e ' s); C, H.i . 9.6 (10.6 e V phot o ns) ; 8.5 (l 1. 7 eV phot o ns); G, H, ; .8.4 (10. 0 e V photo ns); 6.8 (11.7 e V photon s); G,D,! . 7.8 (10.0 e V p ho ton s). 6.1 (1 1. 7 e V pho ton s) ; c-C Hi, a nd c-G. D, ; . 2.2 (10.0 e V photon s); 2.2 (1 1. 7 e V photo ns). Th e di s trib ut io ns of prod uc t io ns o btain ed f ro m th e unim o lec u lar decompos iti o n of th e co m pound io n in eac h s ys te m hav e a lso bee n dete rmin ed a t vario us photon e nergies . a nd co ns id e rab le va ri a ti o n has bee n o bse rve d. In ge ne ra l. th e va ri a ti o ns a re s imil ar to those fo un d e lse wh e re whe n th e kineti c e ne rg y of th e re ac ta nt ion is in c reased. Th e bimo lec ul a r rea c ti o ns of th e C" D;', co mpound io n ob tai ne d fro m C, D,; hav e bee n inv es ti ga ted a t hi ghe r press ures. and se para te ex pe rim e nt s in vo lvin g isotop ica ll y la be le d e thy lenes have prov ided ne w informa ti o n co nce rnin g th e nature of th e co mpound ion in th at s ys te m . Res ul t s ob t ained from o th e r laborator ies a re di sc usse d in s ome de ta il. a nd in mos t ca ses th e diffe re nces found fo r th e s ame s yste m a re ex pli c ab le in te rm s of th e e ne rgy co nt e nt (int e rn a l a nd/o r kin e ti c) of th e re ac ta nt ion . .Key wo rds : Co lli s iona l sta bi li za ti on; hyd rocarbo ns; ion -mo lecu le reac ti o ns : photoioni za tion; ra te c on stant s; stru c tures of iOll s. . IntroductionAlth ough a great deal of inform a ti on has been acc umul a ted co ncernin g the effec t of ion kin e ti c e nergy on the rates and mec hani s ms of ion-molecule r eac tions [1],' th e effects of inte rnal e nergy re main relatively un ex plored. However, several recent in vestigations [2] of proton tran sfer reactions occurring in inorga ni c syste ms usin g hi gh resolution photoionization mass spectrometry have demons trated that th e cross sec tions for ce rtain processes may be extremely sens iti ve to c ha nges in th e vibrational e ne rgy co nte nt of th e reactant ion. Thi s be havior was quantitatively investigated in a recent s tudy from thi s laboratory [3] , whi c h involved a de te rmination of the absolute rate coeffi cient for th e reaction NHt + NH:j ~ NH! + NH2 as a fun ction o...

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Section: B Reactions Occurring At Higher Pressuressupporting

confidence: 71%

“…In a previous articl e from this laboratory [32] it was s hown that propane was obI ained in large yields via an ionic mec hani s m when propylene was photoionized at 10.0 e V at press ures grea ter than 2 torr. Th e mechanism proposed to acco unt for propane formation was as foll ows:…”

Section: B Reactions Occurring At Higher Pressuresmentioning

confidence: 99%

Photoionization of propylene, cyclopropane, and ethylene. The effect of internal energy on the bimolecular reactions of C2H+4 and C3H+6

Sieck¹,

Ausloos²

1972

J. RES. NATL. BUR. STAN. SECT. A.

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“…For all remaining observed ions relative ion currents increase as the propene concentration in the mixture with the argon increase. The C 3 H + 3 ions come from reactions (4), (6) and (8) (5), (13), (15)(17) and (22 (7), (12), (18), (19) and (23). The C 3 H + 6 ions come from the charge-exchange reaction with argon (reaction (9)), mainly.…”

Section: Resultsmentioning

confidence: 99%

“…The ionmolecule chemistry of propene has been studied extensively by the ion cyclotron resonance (ICR) [13] in a tandem mass spectrometer [4,5] and by the photoionization-high-pressure mass spectrometry (HPMS) [6,7]. Aquilanti et al investigated ionic reactions in gaseous butenes [8].…”

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confidence: 99%

Mass Spectrometric Study of Positive Ion-Molecule Reactions in the C₃H₆and Ar Mixtures Inside the High Pressure Ion Source

2013

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Ionmolecule reactions have been measured for the propeneargon mixtures of dierent compositions using a quadrupole mass spectrometer with a high-pressure ion source. The concentration of propane in these mixtures ranged from 10% to 90% (at 10% increment). The following primary and secondary ions: CH Relative ion current intensities for primary and secondary ions are presented as a function of both total mixtures pressure and concentration of propene in the mixture. Primary ions were produced by electrons with the energy of 300 eV. The potential of repeller electrode VR inside the ion source collision chamber was xed at 5 V for all measurements. The total mixture pressure was changed from 0.7 to 26.6 Pa. Schemes of ionmolecule reactions were proposed.

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“…Dans la region de l'ultraviolet d vide (region de 145 A 105 nm) les resultats sont eux aussi nombreux en ce qui concerne les olefines simples (2)(3)(4)(5). L'irradiation de l'isobutene a ete rapportee (6), et un rapport preliminaire sur le butene-l a aussi ete presente (7).…”

Section: Introductionunclassified

Photolyse dans l'ultraviolet à vide du Cis- et du trans-butène-2

Collin¹,

Perrin²

1972

Can. J. Chem.

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In the far U.V. photolysis of cis-and truns-2-butene in the gas phase with the xenon and krypton resonance lines (8.4 and 10.0 eV), we show the main decomposition reactions of the excited 2-butene molecules. Main products from these reactions are 1,3-butadiene (0.4). acetylene (0.3), propadiene + propyne (0.2), and ethylene (0.1) at 8.4 eV. The pressure effect on the decomposition reaction of the chemically activated s-butyl radical was also examined. From these studies, it appears that some of the hydrogen atoms are not "thermal", but carry kinetic energy, although this amount is probably not very large. Decomposition reactions of excited 2-butene molecules (8.4 eV) give one hydrogen atom plus a free radical.

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Photoionization of Propylene at 1236 Å. Reactions of C3D6+ with Added Alkanes

Abstract: Articles you may be interested inAbsolute rate constants for the reaction of O(3 P) atoms with ethylene, propylene, and propylened6 over the temperature range 258-861 K

Cited by 29 publications

References 26 publications

Photoionization of propylene, cyclopropane, and ethylene. The effect of internal energy on the bimolecular reactions of C2H+4 and C3H+6

Photoionization of propylene, cyclopropane, and ethylene. The effect of internal energy on the bimolecular reactions of C2H+4 and C3H+6

Mass Spectrometric Study of Positive Ion-Molecule Reactions in the C₃H₆and Ar Mixtures Inside the High Pressure Ion Source

Photolyse dans l'ultraviolet à vide du Cis- et du trans-butène-2

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Photoionization of Propylene at 1236 Å. Reactions of C3D6+ with Added Alkanes

Abstract: Articles you may be interested inAbsolute rate constants for the reaction of O(3 P) atoms with ethylene, propylene, and propylened6 over the temperature range 258-861 K

Cited by 29 publications

References 26 publications

Photoionization of propylene, cyclopropane, and ethylene. The effect of internal energy on the bimolecular reactions of C2H+4 and C3H+6

Photoionization of propylene, cyclopropane, and ethylene. The effect of internal energy on the bimolecular reactions of C2H+4 and C3H+6

Mass Spectrometric Study of Positive Ion-Molecule Reactions in the C3H6and Ar Mixtures Inside the High Pressure Ion Source

Photolyse dans l'ultraviolet à vide du Cis- et du trans-butène-2

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Product

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Mass Spectrometric Study of Positive Ion-Molecule Reactions in the C₃H₆and Ar Mixtures Inside the High Pressure Ion Source