scholarly journals Personal mass spectral data base in floppy disk system. III. Correlations between mass spectra and unsaturation in CnHlO1 compounds.

1987 ◽  
Vol 35 (6) ◽  
pp. 357-373
Author(s):  
Yasuji Koyama ◽  
Kogoro Maeda
Keyword(s):  
Data Base ◽  
Spectral Data ◽  
Mass Spectra ◽  
Floppy Disk ◽  
Mass Spectral Data ◽  
Disk System ◽  
Mass Spectral

The NIH/EPA mass spectral data base and search system

1983 ◽  
Vol 47 ◽  
pp. 313-316 ◽  
Author(s):  
S.R. Heller ◽  
W.L. Budde ◽  
D.P. Martinsen ◽  
G.W.A. Milne
Keyword(s):  
Data Base ◽  
Spectral Data ◽  
Mass Spectral Data ◽  
Search System ◽  
Mass Spectral

Mass Spectra of Some Carbamates and Related Ureas. II

1968 ◽  
Vol 51 (2) ◽  
pp. 347-365 ◽  
Author(s):  
W R Benson ◽  
J N Damico
Keyword(s):  
Spectral Data ◽  
Relative Abundance ◽  
Mass Spectra ◽  
The Other ◽  
Methyl Isocyanate ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
Fragmentation Patterns ◽  
Sulfur Containing

Abstract Mass spectral data for fourteen carbamates, live dithiocarbamates, one thiocarbamate, and eight phenylureas are given with some interpretations. Among the compounds examined were some sulfur-containing aliphatic oxime carbamates; these lost the sulfur moieties more easily than the methyl isocyanate moiety. In the aryl IV-methylcarbamate series, the CH3NCO moiety appears to be lost most easily, as it is in pyrolysis. When l-(2-chlorophenyI)-3- methylurea is fragmented, unexpectedly the [HNC0]+ ion is found in high relative abundance. However, the remaining ureas undergo fragmentation in a manner similar to their related carbamates. Although the two ethylene bisdithiocarbamates give essentially identical fragmentation patterns, the spectra of the other four thio- and dithiocarbamates show sufficient differences so that they may be distinguished from one another.

Umsetzung von 2-Dimethylamino-3-methyl- [1.3.2] oxazarsolan mit Protonensäuren / Reaction of 2-Dimethylamino-3-methyl-[1,3,2]oxazarsolan with Acid Molecules

1976 ◽  
Vol 31 (2) ◽  
pp. 246-250 ◽  
Author(s):  
Oswald Adler ◽  
Friedhelm Kober
Keyword(s):  
Molecular Weight ◽  
Spectral Data ◽  
Alkyl Group ◽  
Mass Spectra ◽  
Chemical Ionization ◽  
Mass Spectral Data ◽  
Mass Spectral

The reactions of 2-dimethylamino-3-methyl-[1,3,2]oxazarsolane with acid molecules HXR, H2X, HNR2 and H2NR (X = O, S; R = alkyl-group) are examined. IR, NMR and mass spectral data of the obtained arsolanes are discussed. The molecular weight determinations and the mass spectra with chemical ionization show an assoziation by As–N–Asor As–X–As-bridges.

The status and evaluation of a mass spectral data base

1987 ◽  
Vol 14 (6) ◽  
pp. 263-270 ◽  
Author(s):  
D. Thomas Terwilliger ◽  
Ann L. Behbehani ◽  
John C. Ireland ◽  
William L. Budde
Keyword(s):  
Data Base ◽  
Spectral Data ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
The Status
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