Gas-phase photodissociation of FeCH/sub 2//sup +/ and CoCH/sub 2//sup +/: determination of the carbide, carbyne, and carbene bond energies

Journal Article · Wed May 14 04:00:00 EDT 1986 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00270a008· OSTI ID:5658165

Hettich, R L; Freiser, B S

Photodissociation of MCH/sub 2//sup +/ (M = Fe, Co) is observed to yield three products M/sup +/, MC/sup +/, and MCH/sup +/. This result is in contrast to the low-energy collision-induced dissociation of MCH/sub 2//sup +/, which yields M/sup +/ exclusively. From the photoappearance thresholds of the products, the following bond energies are assigned: D/sup 0/(Co/sup +/-CH/sub 2/) = 84 +/- 5 kcal/mol, D/sup 0/(Co/sup +/-CH) = 100 +/- 7 kcal/mol, D/sup 0/(Co/sup +/-C) = 90 +/- 7 kcal/mol, D/sup 0/(Fe/sup +/-CH/sub 2/) = 82 +/- 5 kcal/mol, D/sup 0/(Fe/sup +/-CH) = 101 +/- 7kcal/mol, and D/sup 0/(Fe/sup +/-C) = 94 +/- 7 kcal/mol. Compared to the results of an earlier ion-beam study, the Co/sup +/-CH/sub 2/ bond energy reported here is in excellent agreement while the Fe/sup +/-CH/sub 2/ value is significantly lower.

• Research Organization: Purdue Univ., West Lafayette, IN
• DOE Contract Number: AC02-80ER10689
• OSTI ID: 5658165
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 108:10; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400500* -- Photochemistry
BINDING ENERGY
CARBENES
CARBIDES
CARBON COMPOUNDS
CARBYNES
CATIONS
CHARGED PARTICLES
CHEMICAL BONDS
CHEMICAL REACTIONS
COBALT COMPOUNDS
DATA
DISSOCIATION
ENERGY
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
IONS
IRON COMPOUNDS
LIGANDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
RADICALS
TRANSITION ELEMENT COMPOUNDS