A gas-phase study of FeS sub n sup + (n = 1-6)
- Purdue Univ., West Lafayette, IN (USA)
Photodissociation, collision-induced dissociation (CID), ion-molecule reactions, and kinetics experiments were used to study the series FeS{sub n}{sup +} (n = 1-6) generated from sequential reactions of Fe{sup +} with ethylene sulfide in the gas phase. FeS{sub n}{sup +} (n = 0-5) were observed to react with ethylene sulfide by linear pseudo-first-order kinetics for over 2.5 half-lives, indicating that the ions were formed predominantly in their ground states and in one isomeric form for each ion studied. FeS{sub 6}{sup +}, however, was not observed to react with ethylene sulfide. D{degree}(Fe{sup +}-C{sub 2}H{sub 2}) = 32 {plus minus} 6 kcal/mol was determined by ion-molecule reactions. In addition, photodissociation thresholds gave the following bond energies directly: D{degree}(Fe{sup +}-S) = 61 {plus minus} 6 kcal/mol, D{degree}(Fe{sup +}-S{sub 2}) = 48 {plus minus} 5 kcal/mol, D{degree}(FeS{sup +}-S{sub 2}) = 49 {plus minus} 5 kcal/mol, D{degree} (FeS{sub 2}{sup +}-S{sub 2}) = 49 {plus minus} 5 kcal/mol, and D{degree}(FeS{sub 3}{sup +}-S{sub 2}) = 43 {plus minus} 5 kcal/mol. Photodissociation and ion-molecule reactions were used to assign D{degree}(FeS{sub 4}{sup +}-S{sub 2}) = 38 {plus minus} 5 kcal/mol. These bond energies yield a variety of other thermochemical data. The implications of these results to ion structure are discussed. 23 refs., 14 figs., 7 tabs.
- DOE Contract Number:
- FG02-87ER13766
- OSTI ID:
- 5116974
- Journal Information:
- Journal of the American Chemical Society; (USA), Journal Name: Journal of the American Chemical Society; (USA) Vol. 111:2; ISSN 0002-7863; ISSN JACSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
400500 -- Photochemistry
ALKENES
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
CHEMISTRY
COLLISIONS
DATA
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROCARBONS
INFORMATION
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONS
IRON COMPOUNDS
IRON SULFIDES
MOLECULE COLLISIONS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHOTOCHEMISTRY
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS