Mass spectral studies. Part 120. Facile ionization induced by ammonium salts: mass spectra of nonvolatile compounds using unmodified electron-impact mass spectrometers

1982 ◽  
Vol 47 (20) ◽  
pp. 4008-4010 ◽  
Author(s):  
Ajay K. Bose ◽  
Birendra N. Pramanik ◽  
Peter L. Bartner
Keyword(s):  
Electron Impact ◽  
Mass Spectra ◽  
Ammonium Salts ◽  
Spectral Studies ◽  
Mass Spectrometers ◽  
Mass Spectral ◽  
Electron Impact Mass ◽  
Impact Mass

Metal salt catalyzed carbenoids. XVIII. The electron impact mass spectral behavior of diazocarbonyl compounds. I.

1984 ◽  
Vol 62 (3) ◽  
pp. 554-560 ◽  
Author(s):  
D. S. Wulfman ◽  
James Roberts ◽  
Dennis K. Henderson ◽  
J. C. Romine ◽  
R. S. McDaniel Jr. ◽  
...  
Keyword(s):  
Electron Impact ◽  
Metal Salt ◽  
Spectral Studies ◽  
Spectral Behavior ◽  
Mass Spectral ◽  
Ethyl Diazoacetate ◽  
Methyl Diazoacetate ◽  
Electron Impact Mass ◽  
Impact Mass

Electron impact (EI) mass spectral studies of methyl diazoacetate, ethyl diazoacetate (1), methyl diazoacetoacetate (2), and dimethyl diazomalonate (3) indicate that loss of N2 is exceedingly difficult from the parent ion and was observed only with 3. Diazoacetylacetone exhibits an appreciable (M − 28)+. ExactMass and metastable transitions indicate fragmentation occurs in part via 1,2,3-oxadiazolium ion-radicals (6) or α-lactones (7) to furnish N2O and hyponitrite esters. (M − 28)+ from 1 results from loss of ethylene.

Electron impact mass spectral studies of hydrazine monoamine oxidase inhibitor drugs

1975 ◽  
Vol 2 (2) ◽  
pp. 82-89 ◽  
Author(s):  
Roland M. De Sagher ◽  
André P. De Leenheer ◽  
Albert E. Claeys ◽  
Annie A. Cruyl
Keyword(s):  
Monoamine Oxidase ◽  
Electron Impact ◽  
Monoamine Oxidase Inhibitor ◽  
Oxidase Inhibitor ◽  
Spectral Studies ◽  
Mass Spectral ◽  
Electron Impact Mass ◽  
Impact Mass

Electron impact mass spectral studies of some 2-(2′-benzothiazoyl)- and 2-(2′-benzimidazolyl)-6-aryl-4,5-dihydro3(2H) - pyridazonines

1987 ◽  
Vol 22 (7) ◽  
pp. 477-478 ◽  
Author(s):  
S. N. Sawhney ◽  
Sanjay Bhutani ◽  
Dharam Vir
Keyword(s):  
Electron Impact ◽  
Spectral Studies ◽  
Mass Spectral ◽  
Electron Impact Mass ◽  
Impact Mass

Chemical ionization and electron impact mass spectra of alicyclic substituted 2-aryl-1,3-dithianes

1980 ◽  
Vol 15 (10) ◽  
pp. 502-504 ◽  
Author(s):  
Charles J. Shaw ◽  
Vinayak V. Kane
Keyword(s):  
Electron Impact ◽  
Mass Spectra ◽  
Chemical Ionization ◽  
Electron Impact Mass ◽  
Impact Mass

Notizen: Fast Pulsed Laser Induced Electron Generation for Electron Impact Mass Spectrometry

1988 ◽  
Vol 43 (12) ◽  
pp. 1151-1153 ◽  
Author(s):  
E. R. Rohwer ◽  
R.C. Beavis ◽  
C. Köster ◽  
J. Lindner ◽  
J. Grotemeyer ◽  
...  
Keyword(s):  
Electron Impact ◽  
Mass Spectra ◽  
Ion Source ◽  
Electron Impact Mass Spectrometry ◽  
Uv Laser ◽  
Electron Generation ◽  
Medium Resolution ◽  
Electron Impact Mass ◽  
Impact Mass ◽  
Tof Ms

A new ultra fast electron impact (El) ion source is pre­sented that produces a very short, high intensity electron beam, allowing medium resolution mass spectra to be re­corded without pulsing the ion accelerating voltages in a time-of-flight mass spectrometer (TOF-MS). The ion source requires minimum modification of any TOF-MS equipped with an electrostatic ion reflector and UV-laser. El-spectra are presented for comparison with literature spectra.

ChemInform Abstract: MASS SPECTRA OF NITRONES. ELECTRON IMPACT MASS SPECTRA OF FLUORENONE NITRONES

1981 ◽  
Vol 12 (29) ◽  
Author(s):  
M. A. ABOU-GHARBIA ◽  
D. T. TERWILLIGER ◽  
M. M. JOULLIE ◽  
R. M. SRIVASTAVA
Keyword(s):  
Electron Impact ◽  
Mass Spectra ◽  
Electron Impact Mass ◽  
Impact Mass
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