59078-44-3Relevant academic research and scientific papers
Photolysis of Matrix-Isolated Cyclopropylidene Ketene: Kinetic and Theoretical Studies of the Cyclopropylidene Formation
Monnier, Maurice,Allouche, Alain,Verlaque, Patrick,Aycard, Jean-Pierre
, p. 5977 - 5985 (2007/10/02)
Cyclopropylidene ketene 2 is generated by ultraviolet irradiation (λ >/= 230 nm) of cyclopropanecarbonyl chloride isolated in argon matrices at 15 K.FT-IR spectra of the primary photolysis products (2 and HCl) trapped in the same cage show the formation o
Gasphasen-Reaktionen, 21. Thermische Erzeugung von Alkyl- und Halogenketenen
Bock, Hans,Hirabayashi, Takakuni,Mohmand, Shamsher
, p. 2595 - 2608 (2007/10/02)
Thermal gas phase reactions for the generation of ketenes can be optimized PE-spectroscopically.To eliminate HX from acetyl derivatives R2CH-COX increasing temperatures are required in the sequence HO2CCH3 ca.HCl HBr H2O ca.ROH CH4.By adding NH3, HCl can be removed from the gaseous mixture and thus the PE spectra of pure alkyl ketenes R2C=C=O (R e.g.H, CH3, C2H5) may be recorded. "Fulvene ketene" (4) is obtained from cyclopentadienecarbonyl chloride (this from the dimer) and ethyleneketene (7) by pyrolysis of cyclopropyl spirosubstituted Meldrum's acid (6).Chloro- and bromoketenes are generated as follows: ClHC=C=O from ClH2C-COCl, Cl2C=C=O from Cl3C-COBr with Zn, BrHC=C=O from 2-bromocyclobutanone and NC-HC=C=O from NC-HC=C=O from NC-H2C-COCl.The PE spectra are assigned by radical cation state comparison based on MNDO calculations.
