High resolution Fourier transform stimulated emission and molecular beam holeburning spectroscopy with picosecond excitation sources: Theoretical and experimental results A simple electronbeam control circuit for FTICR electron impact dissociation experiments Rev. Sci. Instrum. 60, 2798 (1989); 10.1063/1.1140662 FTICR probes of silicon cluster chemistry: The special behavior of Si+ 39

Positive silicon cluster ions prepared by laser vaporization in a supersonic beam and trapped in an ion cyclotron resonance cell were probed in chemisorption reactions with ethylene and ammonia. Clusters in the 36–51 atom size range were effectively annealed to unique structural forms by excitation with a XeCl excimer laser followed by cooling through infrared radiation and collisions with argon.

Oxygen difluoride has been shown to react with carbonyl fluoride over a cesium fluoride catalyst to give good yields of the unusual compound bis(trifluoromethy1) trioxide, a stable material having a melting point of -138 O and a normal boiling point of -16". Its formulation as a symmetrical trioxide is supported by its infrared spectrum, nuclear magnetic resonance, and other data. A possible mechanism for its formation is given.n the great majority of its chemical reactions, oxygen

have shown the existence of an inner-sphere perchloratochromium(III) in concentrated perchloric acid.

Summarjr The simplest N-chloroperfluoroalkylenimine, CF,=NCl, has been synthesised for the first time by thermolysis of the previously unknown NN-dichloroperhalogeno-alkylamine CF,Cl-NCl,.ALTHOUGH higher N-chloroperfluoroalkylenimines have been reported,IS2 and isomers of CF,=NCl are known,%* the synthesis of this simplest N-chloroperfluoroalkylenimine was not accomplished until this work. In a novel dechlorination reaction, the new compound was isolated ( >SO%) from the thermolysis of CF,Cl*NCl,.