150986-19-9Relevant academic research and scientific papers
Ion/molecule reactions of carbon cluster ions and acrylonitrile
Sun, Jing,Grützmacher, Hans-Fr.,Lifshitz, Chava
, p. 8382 - 8388 (1993)
Ion/molecule reactions of carbon cluster ions (Cn?+, n = 10-18 and 20) in the gas phase with acrylonitrile (ACN) as the neutral reagent were investigated by Fourier transform ion cyclotron resonance spectrometry (FT-ICR). The carbon cluster ions studied were generated by electron impact ionization of perchlorinated polyaromatic compounds (PPA) and subsequent exhaustive chlorine elimination in the external ion source of the FT-ICR spectrometer. The precursor PPA were prepared by chlorination of the appropriate polyaromatic hydrocarbons using the BMC reagent. The only reaction observed for Cn?+ was the formation of adduct ions stabilized by radiative association (for n = 10-18 and 20) with the exception of C16?+ which stabilized the adduct ion by loss of a neutral C3. The rate constants for the reaction of Cn?+ with ACN vary from kbi = -13 cm3 molecule-1 s-1 (C18?+, C20?+) to kbi = 7.1 × 10-10 cm3 molecule-1 s-1 (C13?+) and are distinctly larger than with HCN and C2H4 studied before. C13?+ and C17?+ exhibit extraordinary reactivity with ACN. For structural information about the product ions Cn+3H3N?+formed from Cn?+ and ACN, collision induced dissociation (CID) spectra were obtained by collision of the accelerated product ions of the ion/molecule reactions with argon gas in the FT-ICR cell for two product ions of sufficient large abundances. In addition, the deprotonation of Cn+3H3N+ (n = 10, 13) product ions by a series of reference bases was studied resulting in a proton affinity of c. 822 and 815 kJ/mol for the conjugate bases C13H2N and C16H2N, respectively.
