Associative ionization of excited sodium species with various ligands: assessing relative bonding strengths of ion-ligand interactions

Associative ionization reactions of excited sodium species with water, acet onitrile (CH3CN), benzene (C6H6), acetone [(CH3)(2)CO]. diethylether (Et2O) , ethanol (CH3CH2OH), methanol (CH3CH), ammonia (NH3), 1-propanol (CH3CH2CH 2OH), n-butyl alcohol (CH3CH2CH2CH2OH), and dimethyloxyethane (DME) were in vestigated under thermal conditions using a fast flow reactor. This is the first reported heteronuclear associative ionization reaction of excited sod ium species with these ligands. The measurements reported herein allow for an assessment of the relative extent of interaction of sodium ions with ben zene compared to the above mentioned ligands. Particularly significant are the comparative studies of water and benzene, which provide evidence that t he binding energy of Na- with benzene exceeds that with water. (C) 2001 Els evier Science B.V.