TY  - JOUR
A1  - Hartmann, Olaf-René
A1  - Wanczek, Karl-Peter
A1  - Hartmann, Hermann
T1  - Mass spectrum, mechanism and structure in the ion chemistry of trimethylmethylenephosphorane
T2  - Zeitschrift für Naturforschung, A
N2  - The gas phase ion chemistry of the simplest known phosphorus ylide, trimethylmethylenephosphorane, has been studied in the mass range m/e=2 - 186 and the pressure range 10-7-10-4 Torr. The most abundant product ion, m/e = 104, (CH3)2C2H5PCH2'+ is formed by a methylene group transfer reaction of the molecular ion. Almost all of the other product ions formed from the molecular ion can be subsumed under the general formula (CH3)3PCHPRn+ (R = H, CH3; n=1,2,3). The reactions indicate that the molecular ion has lost its ylide character almost completely. The protonated molecule is formed almost exclusively by a reaction of the fragment ion m/e = 75. This reaction and the CH3PH group transfer reaction indicate a cyclic structure (CH3) HP(CH2)2+ for this ion. A cyclic structure is also assumed for the ion m/e = 73, PC3H6+, which undergoes P and PH transfer reactions. The reactions of the ion m/e = 47 are consistent with the structure CH3PH+. The ICR and mass spectra are given, some metastable decompositions are discussed.
Y1  - 2014
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/73798
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-737987
SN  - 1865-7109
VL  - 31
IS  - 6
SP  - 630
EP  - 636
PB  - Verlag der Zeitschrift für Naturforschung
CY  - Tübingen
ER  -