Mass spectrometry of diamantane and some adamantane derivatives

1980 ◽  
Vol 58 (20) ◽  
pp. 2189-2195 ◽  
Author(s):  
Robert J. Waltman ◽  
A. Campbell Ling
Keyword(s):  
Mass Spectrometry ◽  
Hydrogen Atom ◽  
Mass Spectrometric ◽  
Adamantane Derivatives ◽  
Intensity Data ◽  
Metastable Peak ◽  
Fragmentation Pathways ◽  
Peak Intensity ◽  
Mass Spectrometric Fragmentation

The mass spectrometric fragmentation of adamantane, adamantane-d6, diamantane, 1- and 2-adamantanol, and 3,5,7-trimethyl-1-adamantanol has been re-examined, and new data for diamantane and 3,5,7-trimethyl-1-adamantanol are presented in more detail. Metastable peak data have been used to support potential fragmentation pathways. Simple statistical considerations applied to peak intensity data seem to indicate that ionization occurs at the primary bridgehead in both adamantane and diamantane, and that loss of a primary hydrogen is favored over loss of a secondary hydrogen atom.

Formation of Organometallic Species, [M – H]+ Ions and Radical Cations upon Mass Spectrometric Fragmentation of Mercury–Crown Ether Complexes

2009 ◽  
Vol 15 (4) ◽  
pp. 479-486 ◽  
Author(s):  
Rafał Frański ◽  
Błażej Gierczyk
Keyword(s):  
Mass Spectrometry ◽  
Crown Ether ◽  
Radical Cations ◽  
Mass Spectrometric ◽  
Tandem Mass ◽  
Fragmentation Pathways ◽  
Factors Influencing ◽  
Crown Ether Complexes ◽  
Mass Spectrometric Fragmentation ◽  
Ether Molecule

Mass spectrometric fragmentation pathways of [M + HgClO4]+ (M – crown ether molecule), determined by tandem mass spectrometry experiments, are discussed in detail. The decomposition of [M + HgClO4]+ proceeds along three fragmentation pathways: formation of [M – H]+ ions, formation of organometallic species, namely [M – H + Hg]+ ions, and formation of radical cations [M]+•. The factors influencing these processes, namely crown ether cavities and the presence of electron withdrawing/electron donor groups, have been discussed.

Mass Spectrometric Investigation of Protonated and Cationized Molecules of Oxaalkyl Phosphates

2002 ◽  
Vol 8 (6) ◽  
pp. 451-460 ◽  
Author(s):  
Natalya Lyapchenko ◽  
Rafał Frański ◽  
Grzegorz Schroeder
Keyword(s):  
Mass Spectrometry ◽  
Alkali Metal ◽  
Secondary Ion Mass Spectrometry ◽  
Metal Cations ◽  
Mass Spectrometric ◽  
Alkali Metal Cations ◽  
Ionisation Mass Spectrometry ◽  
Mass Spectrometric Fragmentation ◽  
Protonated Molecules ◽  
Secondary Ion

Mass spectrometric fragmentation pathways of protonated molecules of oxaalkyl phosphates and their complexes with alkali metal cations are discussed in this paper. Liquid secondary ion mass spectrometry (LSIMS) was used as the ionisation technique and mass spectra from B/E linked scans were registered to elucidate the mass spectrometric decomposition of the studied ions. Mainly loss of the ether molecules H2C=HCOCH3 and HOH2C–H2COCH3 was observed. The elimination of neutrals containing metal, for example, K-CH2CH2OCH3 or KOCH2CH2OCH3 also occurred. In the case of phosphate (III) an unusual loss of two CH3CH2OCH3 molecules and a Li or Na atom was observed. Electrospray ionisation mass spectrometry (ESIMS) was applied in order to check the ability of the studied tripodands to form complexes with alkali metal cations.

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