Electron impact studies. CXVIII. An ion cyclotron resonance study of the reactivity of negative ions derived from ethenetetracarbonitrile. Anionic polymerization in the gas phase

1977 ◽  
Vol 30 (10) ◽  
pp. 2161 ◽  
Author(s):  
JH Bowie
Keyword(s):  
Gas Phase ◽  
Electron Impact ◽  
Anionic Polymerization ◽  
Cyclotron Resonance ◽  
Negative Ions ◽  
Ion Cyclotron Resonance ◽  
Impact Studies ◽  
Stable Adduct ◽  
Ion Cyclotron

.The [M·–l CN·I- species from ethenetetracarbonitrile (tetracyanoethylene) reacts with neutral ethene- tetracarbonitrile to give the stable adduct C11N7-. The decomposing form of this adduct eliminates C2N2 to produce C,9N5- which may react with ethenetetracarbonitrile to yield C15N,9-. Analogous anionic polymerization reactions yield a number of detectable peaks in the i.c.r. spectrum of tetra- cyanoethylene, with the structures of the ions possibly corresponding to a. Diagram Polymerization of this type can also be initiated by other nucleophiles including Cl-, Br-, I- and CF3CO2-.

Electron impact studies. CIX. The detection of doubly charged negative ions by ion cyclotron resonance spectroscopy

1977 ◽  
Vol 30 (2) ◽  
pp. 417 ◽  
Author(s):  
BJ Stapleton ◽  
JH Bowie
Keyword(s):  
Electron Impact ◽  
Cyclotron Resonance ◽  
Negative Ions ◽  
Alkyl Halides ◽  
Resonance Spectroscopy ◽  
Ion Cyclotron Resonance ◽  
Impact Studies ◽  
Ion Cyclotron ◽  
Doubly Charged

Ion cyclotron resonance allows the sensitive measurement of doubly charged anions at low cell pressures. Evidence is presented which suggests the formation of X-- (X = halogen) ions from alkyl halides.

Electron impact studies. LXXXVIII. formation of an adduct between the trifluoroacetate anion and perfluoroacetic anhydride by ion cyclotron resonance

1974 ◽  
Vol 27 (9) ◽  
pp. 1923 ◽  
Author(s):  
JH Bowie ◽  
BD Williams
Keyword(s):  
Gas Phase ◽  
Electron Impact ◽  
Direct Observation ◽  
Cyclotron Resonance ◽  
Ion Cyclotron Resonance ◽  
Phase Reaction ◽  
Gas Phase Reaction ◽  
Tetrahedral Intermediate ◽  
Impact Studies ◽  
Association Complex

The gas phase reaction between the trifluoroacetate anion and perfluoroacetic anhydride produces a 1 : 1 adduct. The decompositions of this adduct suggest a tetrahedral species rather than a loose association complex. If this is so, this constitutes the first direct observation of the formation of a tetrahedral intermediate produced by anionic displacement at a carbonyl centre.

Electron impact studies. XCIII. The reactions of negative ions from 3- and 4-nitrophthalic anhydrides

1975 ◽  
Vol 28 (3) ◽  
pp. 563 ◽  
Author(s):  
JH Bowie ◽  
BD Williams
Keyword(s):  
Electron Impact ◽  
Phthalic Anhydride ◽  
Cyclotron Resonance ◽  
Mass Spectra ◽  
Negative Ions ◽  
Negative Ion ◽  
Ion Cyclotron Resonance ◽  
Impact Studies ◽  
Ion Molecule Reactions ◽  
Positive Ions

Possible structures for some rearrangement ions in the negative ion mass spectra of 3- and 4-nitro- phthalic anhydride are suggested from an examination of the + E spectra obtained by the conversion of the negative ions to positive ions by charge-stripping reactions. The reactivities of the non-decomposing negative ions have been investigated by observation of their ion-molecule reactions with the neutral anhydride in the cell of an ion cyclotron resonance spectrometer.

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