Mass spectrometric investigation of the low-pressure pyrolysis of borane carbonyl. Bond dissociation energy of diborane

1969 ◽  
Vol 73 (4) ◽  
pp. 873-882 ◽  
Author(s):  
Thomas P. Fehlner ◽  
G. W. Mappes
Keyword(s):  
Bond Dissociation Energy ◽  
Dissociation Energy ◽  
Low Pressure ◽  
Mass Spectrometric ◽  
Spectrometric Investigation ◽  
Mass Spectrometric Investigation ◽  
Bond Dissociation ◽  
Carbonyl Bond

Mass‐Spectrometric Investigation of the Low‐Pressure Dissociation of B2H6

1964 ◽  
Vol 41 (7) ◽  
pp. 2207-2208 ◽  
Author(s):  
E. J. Sinke ◽  
G. A. Pressley ◽  
A. B. Baylis ◽  
F. E. Stafford
Keyword(s):  
Low Pressure ◽  
Mass Spectrometric ◽  
Spectrometric Investigation ◽  
Mass Spectrometric Investigation

Mass spectrometric observation and bond dissociation energy of dimolybdenum, Mo2(g)

1978 ◽  
Vol 17 (11) ◽  
pp. 3211-3213 ◽  
Author(s):  
S. K. Gupta ◽  
R. M. Atkins ◽  
K. A. Gingerich
Keyword(s):  
Bond Dissociation Energy ◽  
Dissociation Energy ◽  
Mass Spectrometric ◽  
Bond Dissociation

Photochemical Studies by Means of a Field Ion Mass Spectrometer

1966 ◽  
Vol 21 (1-2) ◽  
pp. 135-140 ◽  
Author(s):  
H. Okabe ◽  
H. D. Beckey ◽  
W. Groth
Keyword(s):  
Mass Spectrometer ◽  
Mass Spectra ◽  
Flow System ◽  
Low Pressure ◽  
Ion Source ◽  
Mass Spectrometric ◽  
Gas Pressure ◽  
Spectrometric Investigation ◽  
Mercury Lamp ◽  
Mass Spectrometric Investigation

A mass spectrometric investigation was carried out on the direct photolyses of propene, 1-butene, and hydrazine at 1849 A with a field ion source in a flow system. Comparisons were made with Pt tip and wire emitters. It was found that, without illumination, mass spectra obtained with the wire were accompanied by a number of fragment peaks amounting to almost 1%. Since these peaks interfere with those produced photochemically, the tip emitter was used mostly for the photochemical studies although it gave 100 times less current and was less stable. The photochemical products formed at a gas pressure of 10 μ by a low pressure mercury lamp were detected after approximately 10 m sec. The three main peaks observed in the propene photolysis were at masses 27, 28, and 56, indicating the processes:C3H6+hv→C2H3+CH3, C3H6+hv→C2H4+CH2, CH2+C3H6→C4H8.The photolysis of 1-butene gave four main peaks at masses 40, 41, 42, and 70, suggesting steps, C4H8+hv→C3H4+ (H+CH3) or CH4, C4H8+hv→C3H5+CH3, C4H8+hv→C3H6+CH2, CH2+C4H8C5H10.The only peak found with the photolysis of hydrazine was at mass 17, indicating the step, N2H4+hv→NH3+NH.The possibility of forming these products by secondary processes is discussed.

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