Methylene, difluoro-

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Ion clustering data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: John E. Bartmess

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Clustering reactions

(CF3- • 4294967295Methylene, difluoro-) + Methylene, difluoro- = CF3-

By formula: (CF3- • 4294967295CF2) + CF2 = CF3-

Quantity Value Units Method Reference Comment
Δr208. ± 10.kJ/molN/ADeyerl, Alconcel, et al., 2001gas phase; Adiabatic EA, from vibrational structure of spectrum
Δr213. ± 12.kJ/molN/ABartmess, Scott, et al., 1979gas phase; Paulino and Squires, 1991 suggests that this acidity may be too weak by ca. 5 kcal/mol. However, G2 calcn(JEB) give ΔHacid=379.9, ΔGacid=372.0; value altered from reference due to change in acidity scale
Δr234. ± 11.kJ/molCIDTPaulino and Squires, 1991gas phase; Neutral heat is based on a fluoroform acidity that may be too weak by up to 5 kcal/mol


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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Deyerl, Alconcel, et al., 2001
Deyerl, H.J.; Alconcel, L.S.; Continetti, R.E., Photodetachment imaging studies of the electron affinity of CF3, J. Phys. Chem. A, 2001, 105, 3, 552-557, . [all data]

Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr., The gas phase acidity scale from methanol to phenol, J. Am. Chem. Soc., 1979, 101, 6047. [all data]

Paulino and Squires, 1991
Paulino, J.A.; Squires, R.R., Carbene Thermochemistry from Collision-Induced Dissociation Threshold Energy Measurements - The Heats of Formation of X1A1 CF2 and X1A1 CCl2, J. Am. Chem. Soc., 1991, 113, 15, 5573, . [all data]


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