Accession Number : ADA219830


Title :   Production of Protonated Methanol Ions Via Intermolecular Reactions within Van der Waals Clusters of Dime Dimethyl Ether. Revision


Descriptive Note : Technical rept.


Corporate Author : STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY


Personal Author(s) : Coolbaugh, M. T. ; Peifer, William R. ; Garvey, James F.


Report Date : 02 FEB 1990


Pagination or Media Count : 13


Abstract : We report in this communication the first observation of protonated methanol generated within singly charged ion clusters of dimethyl ether. By studying the variation of ion intensity as a function of cluster size, we note that the ion cluster with the empirical formula of (CH3OCH3)2(CH3OH2)(+) is exceptionally intense in the mass spectrum. This novel 'magic number' we feel is due to the enhanced stability of 2 dimethyl ether molecules bonding (via hydrogen bonds) directly to the two hydroxy hydrogens. The formations of this cluster ion is rationalized in terms of a mechanism employing a trimethyloxonium cation which undergoes an internal rearrangement followed by decomposition to form protonated methanol and ethylene.


Descriptors :   *SYNTHESIS(CHEMISTRY) , *CATIONS , *METHANOLS , INTENSITY , PROTONS , HYDROGEN , VARIATIONS , ETHYLENE , CLUSTERING , ETHERS , MOLECULE MOLECULE INTERACTIONS , DECOMPOSITION , HYDROXYL RADICALS , FORMULATIONS(CHEMISTRY) , METHYL RADICALS , SIZES(DIMENSIONS) , MASS SPECTRA , HYDROGEN BONDS


Subject Categories : ORGANIC CHEMISTRY
      PHYSICAL CHEMISTRY


Distribution Statement : APPROVED FOR PUBLIC RELEASE