Kinetic and electronic energy dependence of the reactions of Sc[sup +] and Ti[sup +] with D[sub 2]O
- Univ. of Utah, Salt Lake City, UT (United States)
The reactions of Sc[sup +] and Ti[sup +] with D[sub 2]O are studied as a function of translational energy in a guided ion beam tandem mass spectrometer. Both ions react to form three ionic products. MD[sup +], MO[sup +], and MOD[sup +]. MO[sup +] formation occurs exothermically by dehydrogenation of D[sub 2]O, even though this reaction is spin forbidden for reaction of ground state M[sup 1] in both systems. In the titanium system, the effect of electronic energy on product formation is probed by varying the conditions used for forming Ti[sup +]. The a[sup 2]F state of Ti[sup +] reacts much more efficiently than the a[sup 4]F ground state at forming all three product ions. The relative reaction efficiencies are consistent with a recent study of the reverse reactions of MO[sup +] + D[sub 2]. State-specific cross sections and the competition between the various products indicate that the reactions occur primarily through a low-spin state of a D-M[sup +]-OD intermediate. Thresholds of the cross sections for endothermic formation of all three product ions are consistent with values calculated by using previously measured bond energies. 44 refs., 5 figs., 3 tabs.
- OSTI ID:
- 6730189
- Journal Information:
- Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 98:44; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
661300 -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALCOHOLS
ALKANES
CATALYSTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DEHYDROGENATION
ELECTRONIC STRUCTURE
ENERGY LEVELS
GROUND STATES
HEAVY WATER
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
KINETICS
MASS SPECTROMETERS
MASS SPECTROSCOPY
MEASURING INSTRUMENTS
METHANE
METHANOL
ORGANIC COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
REACTION KINETICS
SCANDIUM COMPOUNDS
SPECTROMETERS
SPECTROSCOPY
SYNTHESIS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WATER