Effect of Donor–Acceptor Interaction on the Kinetics of Gas-phase Chemical Reactions

Kapralova, G. A.; Suchkova, T; Chaikin, A. M.

doi:10.1070/mc1993v003n03abeh000251

Cited by 5 publications

(11 citation statements)

References 9 publications

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“…This procedure results in a direct determination of the kinetic parameters that govern the system. Comparison of our findings with the only other rate constant reported for reaction 1, that of Kapralova et al, 15 indicates that Apparatus and Measurements. The experimental apparatus is depicted in Figure 1 and consists of a high-temperature flow reactor interfaced to a molecular-beam mass spectrometer.…”

Section: Introductionsupporting

confidence: 79%

“…This procedure results in a direct determination of the kinetic parameters that govern the system. Comparison of our findings with the only other rate constant reported for reaction 1, that of Kapralova et al, indicates that the gas-phase reaction between BCl 3 and NH 3 is much slower than previously thought.…”

Section: Introductionsupporting

confidence: 64%

“…No mass fragments unique to the Cl 3 B:NH 3 adduct were observed, which is not surprising considering the difficulty reported by Avent et al in isolating this compound. Following Kwon and McGee's report, several other investigators have documented reaction 1. − …”

Section: Introductionmentioning

confidence: 92%

“…Following Kwon and McGee's report, several other investigators have documented reaction 1. [14][15][16] These observations cast doubt on the conclusions of several researchers who state that BN CVD is kinetically limited by the adsorption of BCl 3 or that homogeneous reactions are unimportant. Patibandla and Luthra 17 and Lee et al 18 measured BN deposition rates and found an activation barrier of [35][36][37][38][39][40] kcal mol -1 .…”

Section: Introductionmentioning

confidence: 99%

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Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃

McDaniel

Allendorf

1998

J. Phys. Chem. A

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The reaction between BCl 3 and NH 3 to produce dichloroboramine (Cl 2 BNH 2 ) and HCl was probed using a flow-tube reactor interfaced to a molecular-beam mass-sampling system. A composite method that couples the detailed simulation of the fluid mechanics and chemical reactions occurring in the flow tube to an algorithm for nonlinear least-squares optimization was used to extract the kinetic parameters from the experiment. The rate constant for this gas-phase reaction is k (cm 3 mol -1 s -1 ) ) 4.21 × 10 11 exp[-(8350 cal mol -1 )/(RT)] with an estimated uncertainty of 10-15% over the temperature range 670-920 K. The results indicate that surface reactions involving BCl 3 and NH 3 occur in the flow tube, but their contributions to the observed chemical behavior of the system can be quantified and therefore do not affect the kinetic measurements reported here. In addition, the low-energy barrier to this gas-phase reaction has important implications for the chemical vapor deposition of boron nitride from BCl 3 and NH 3 .

show abstract

Section: Introductionsupporting

confidence: 79%

“…This procedure results in a direct determination of the kinetic parameters that govern the system. Comparison of our findings with the only other rate constant reported for reaction 1, that of Kapralova et al, indicates that the gas-phase reaction between BCl 3 and NH 3 is much slower than previously thought.…”

Section: Introductionsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃

McDaniel

Allendorf

1998

J. Phys. Chem. A

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“…Close similarities exist between the termolecular reactions involving only neutral species 42,43 and ion ± molecule reactions. On the other hand, there are also differences caused by the specific character of interaction between ions and neutral species.…”

Section: Characteristic Features Of Ion ± Molecule Interactionsmentioning

confidence: 88%

Three-body ion–molecule processes

Karachevtsev¹,

Vinogradov²

1999

Russ. Chem. Rev.

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The neutron emission spectrum from d + t → α + n reactions has been measured as a means to study the plasma response to radio frequency (RF) power coupled to hydrogen and deuteron minority components (through fundamental and second harmonic, respectively) in a tritium discharge at JET. The spectrum was measured with the magnetic proton recoil spectrometer and was analysed in terms of two spectral components due to thermal (TH) and high-energy (HE) deuterons interacting with the bulk ion population of thermal tritons. The results were used to derive information on the deuteron population in terms of temperatures (T TH and T HE ) as well as corresponding particle and kinetic energy densities of the plasma; the bulk ion temperature (T i = T TH ) was determined both before (with Ohmic heating only) and during the RF pulse. Similar information on protons was derived from other measurements in order to estimate the different RF effects on protons and deuterons. This paper illustrates qualitatively the type of empirical ion kinetic information that can be obtained from neutron emission spectroscopy; the data serves as a basis for comparison with results of predictive and interpretative models on RF effects in plasmas.

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Thermochemistry of Molecules in the B−N−Cl−H System: Ab Initio Predictions Using the BAC-MP4 Method

Allendorf

Melius

1997

J. Phys. Chem. A

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A self-consistent set of thermochemical data for 33 molecules in the B-N-Cl-H system are obtained from a combination of ab initio electronic structure calculations and empirical corrections. Calculations were performed for both stable and radical species. Good agreement is found between the calculations and experimental heats of formation for most molecules containing B, H, and Cl. In addition, the BAC-MP4 and experimental heats of formation for H 3 B:NH 3 are also in reasonable agreement, suggesting that the bond additivity parameters chosen for B-N bonds will provide reasonably accurate heats of formation for compounds containing this type of bond. Transition-state energies for two reactions involving BCl 3 and NH 3 are also predicted. Polynomial fits of the predicted thermodynamic data over the 300-4000 K temperature range are included in the Supporting Information.

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Effect of Donor–Acceptor Interaction on the Kinetics of Gas-phase Chemical Reactions

Cited by 5 publications

References 9 publications

Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃

Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃

Three-body ion–molecule processes

Thermochemistry of Molecules in the B−N−Cl−H System: Ab Initio Predictions Using the BAC-MP4 Method

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Effect of Donor–Acceptor Interaction on the Kinetics of Gas-phase Chemical Reactions

Cited by 5 publications

References 9 publications

Flow-Tube Investigation of the High-Temperature Reaction between BCl3 and NH3

Flow-Tube Investigation of the High-Temperature Reaction between BCl3 and NH3

Three-body ion–molecule processes

Thermochemistry of Molecules in the B−N−Cl−H System: Ab Initio Predictions Using the BAC-MP4 Method

Contact Info

Product

Resources

About

Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃

Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃