Mechanistic studies of processes involving C-C bond cleavage in gas-phase organometallic reactions using product kinetic energy release distributions: Co sup + reacting with cyclopentane

Journal Article · Thu Mar 01 00:00:00 EST 1990 · Organometallics; (USA)

DOI:https://doi.org/10.1021/om00117a016· OSTI ID:6380346

van Koppen, P A.M.; Bowers, M T ^[1]; Beauchamp, J L ^[2]

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1. Univ. of California, Santa Barbara (USA)
2. California Institute of Technology, Pasadena (USA)

A reverse-geometry mass spectrometer is used to obtain product ion kinetic energy release distributions to probe the energetics and mechanisms of several gas-phase organometallic reactions. In particular, we examine the mechanism for C{sub 2}H{sub 4} and C{sub 3}H{sub 6} elimination from Co(cyclopentane){sup +}. The kinetic energy release distribution associated with these processes can be modeled by using phase space calculations assuming, for the C{sub 3}H{sub 6} elimination process, propene rather than cyclopropane is being eliminated as the product neutral, and for the C{sub 2}H{sub 4} elimination process, Co(propene){sup +} rather than (cobaltacyclobutane){sup +} is being formed as the product ion. In addition, we obtain a heat of formation for the cobalt ethylene ion of 255 kcal/mol at 0 K, corresponding to a bond dissociation energy of 42 kcal/mol at 0 K, by fitting the theoretical results to the experimental distribution.

• OSTI ID: 6380346
• Journal Information: Organometallics; (USA), Vol. 9:3; ISSN 0276-7333
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COBALT IONS
CHEMICAL REACTION KINETICS
PENTANE
CHEMICAL BONDS
CLEAVAGE
DATA ANALYSIS
EXPERIMENTAL DATA
MEASURING INSTRUMENTS
MEASURING METHODS
ALKANES
CHARGED PARTICLES
CRYSTAL STRUCTURE
DATA
HYDROCARBONS
INFORMATION
IONS
KINETICS
MICROSTRUCTURE
NUMERICAL DATA
ORGANIC COMPOUNDS
REACTION KINETICS
400201* - Chemical & Physicochemical Properties