Mass spectrometric study of the reaction of BF3 with B2O3; the identification and heat of formation of B2OF4

The reaction of BF3 with B2O3 in a molecular flow reactor has been studied with a mass spectrometer. Over the temperature range 930–1300 K the reaction has been found to produce B2OF4 with the stoichiometry[Formula: see text]From the temperature dependence of the equilibrium constant the enthalpy change for this reaction was determined to be 18.5 ± 3 kcal/mole and ΔHf0 (B2OF4) calculated to be −454 ± 2 kcal/mole at 1100 K.

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Mass spectrometric study of the thermal decomposition of dimanganese decacarbonyl and dicobalt octacarbonyl

Canadian Journal of Chemistry ◽

10.1139/v70-097 ◽

1970 ◽

Vol 48 (4) ◽

pp. 593-597 ◽

Cited By ~ 29

Author(s):

D. R. Bidinosti ◽

N. S. McIntyre

Keyword(s):

Equilibrium Constants ◽

Mass Spectrometric Study ◽

Molecular Beams ◽

Mass Spectrometric ◽

Spectrometric Study ◽

Kcal Mole ◽

Flow Reactors ◽

Dicobalt Octacarbonyl ◽

Enthalpy Changes ◽

Dimanganese Decacarbonyl

The free radicals •Mn(CO)5 and •Co(CO)4 have been produced by the pyrolysis of Mn2(CO)10 and Co2(CO)8 in graphite flow reactors. The effusing molecular beams from these reactors were analyzed mass spectrometrically. Evidence is presented for the following equilibria[Formula: see text]From the temperature dependence of the equilibrium constants, enthalpy changes of 24.9 ± 2 and 14.5 ± 2 kcal/mole, respectively, have been obtained. These enthalpy changes give D(Mn—Mn) = 21 ± 3 kcal/mole and D(Co—Co) = 13 ± 3 kcal/mole, which substantiate the earlier literature values based on electron impact measurements.

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Mass Spectrometric Studies of the Ionization and Thermal Decomposition of Tungsten π-Cyclopentadienyl Tricarbonyl Dimer

Canadian Journal of Chemistry ◽

10.1139/v75-089 ◽

1975 ◽

Vol 53 (5) ◽

pp. 628-632 ◽

Cited By ~ 16

Author(s):

J. R. Krause ◽

D. R. Bidinosti

Keyword(s):

Thermal Decomposition ◽

High Temperature ◽

Mass Spectrum ◽

Temperature Dependence ◽

Electron Impact ◽

Enthalpy Change ◽

Mass Spectrometric ◽

Molecular Flow ◽

Electron Impact Mass ◽

Impact Mass

The ionization and thermal decomposition of tungsten π-cyclopentadienyl tricarbonyl dimer [WC5H5(CO)3]2 was investigated using a mass spectrometer fitted with single and double cell molecular flow inlet systems.The electron impact mass spectrum and appearance potentials for the principle ions in the spectrum have been measured and recorded.The enthalpy change for the dissociation[Formula: see text]obtained from van't Hoff plots of the temperature dependence of the equilibrium constant was found to be 234.4 ± 3.8 kJ/mol. This result was substantiated by an electron impact value of 221.0 ± 20.1 kJ/mol based on an ionization potential for ·WC5H5(CO)3 of 7.66 ± 0.05 eV measured in the high temperature studies.

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VUV photoionization aerosol mass spectrometric study on the iodine oxide particles formed from O3-initiated photooxidation of diiodomethane (CH2I2)

RSC Advances ◽

10.1039/c7ra11413c ◽

2017 ◽

Vol 7 (89) ◽

pp. 56779-56787 ◽

Cited By ~ 3

Author(s):

Nana Wei ◽

Changjin Hu ◽

Shanshan Zhou ◽

Qiao Ma ◽

Pavel Mikuška ◽

...

Keyword(s):

Vacuum Ultraviolet ◽

Flow Reactor ◽

Mass Spectrometric Study ◽

Mass Spectrometric ◽

Spectrometric Study ◽

Aerosol Mass Spectrometer ◽

Aerosol Mass ◽

Oxide Particles ◽

Vuv Photoionization ◽

First Time

IOPs formed from O3-initiated photooxidation of CH2I2 were investigated based on the combination of a thermal desorption/tunable vacuum ultraviolet time-of-flight photoionization aerosol mass spectrometer with a flow reactor for the first time.

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