Abstract
The value ΔfH0° (CoF3(cr)) = –861 ± 10 kJ/mol is determined using the data on equilibria of the reactions involving crystalline cobalt(III) fluoride. The features of chemical and thermal behavior of this compound (in particular, its easy hydrolyzability due to hygroscopic properties and vaporization without decomposition to fluorine and difluoride) are explained. The enthalpies of formation of crystalline and gaseous cobalt fluorides CoFn (n = 2–4), as well as some of their negatively charged ions, and electron affinity energies of CoF3 and CoF4 (3.42 and 6.10 eV, respectively) are reported. Quantitative comparison of the efficiencies of iron, manganese, and cobalt trifluorides used as fluorinating agents to synthesize organic and inorganic compounds is performed.
Similar content being viewed by others
References
Thermodynamic Properties of Individual Substances. Electronic Reference Book, Vol. 5: The Elements Mn, Cr, V, Sc and Their Compounds. http://www.chem.msu.su/rrus/tsiv/.
E. L. Osina, N. S. Chilingarov, S. B. Osin, et al., Russ. J. Phys. Chem. (in press).
R. S. Jessup, F. Brickwedde, and H. Wechler, J. Res. Natl. Bur. Stand. 44, 457 (1950).
A. Yu. Lukonin, V. Yu. Markov, and O. V. Boltalina, Vestn. Mosk. Univ., Ser. 2: Khim. 42, 3 (2001).
IVTANTHERMO. Database on Thermodynamic Properties of Individual Substances. Developed in Thermocentre of the Russian Academy of science. Copyright: CRC Press (1993).
O. S. Andrienko, V. I. Sachkov, and V. A. Yanovskii, Practical Methods for Inserting Fluorine into Organic Compounds (NTL, Tomsk, 2010) [in Russian].
D. V. Rau, H. C. Chilingarov, L. N. Sidorov, et al., Vestn. Mosk. Univ., Ser. 2: Khim. 39, 153 (1998).
A. Popovich, A. Lesar, J. V. Rau, et al., Rapid Commun. Mass Spectrom. 15, 749 (2001).
M. S. Leskiv, N. S. Chilingarov, J. V. Rau, et al., J. Fluorine Chem. 129, 529 (2008).
N. S. Chilingarov, E. V. Skokan, D. V. Rau, et al., Zh. Fiz. Khim. 66, 2612 (1992).
D. V. Rau, Candidate’s Dissertation in Chemistry (Moscow, 1990).
P. Y. Hou, et al., Proceedings of the Symposium on High Temperature Corrosion and Materials Chemistry (Electrochemical Soc., New Jersey, 1998), Ed. by P. Y. Hou et al., p. 570.
M. I. Nikitin, V. I. Tsirel’nikov, E. G. Rakov, et al., Russ. J. Inorg. Chem. 42, 1228 (1997).
A. Tressuad, F. Pintchovski, L. Lozano, et al., Mater. Res. Bull. 11, 689 (1976). doi https://doi.org/10.1016/0025-5408(76)90146-X
M. I. Nikitin, Russ. J. Inorg. Chem. 53, 1292 (2008). doi https://doi.org/10.1134/S0036023608080238
M. I. Nikitin and E. N. Karpukhina, Russ. J. Inorg. Chem. 52, 334 (2007). doi https://doi.org/10.1134/S0036023607030072
S. V. Kuznetsov, Candidate’s Dissertation in Chemistry (Moscow, 1987).
M. I. Nikitin and E. V. Karpukhina, Russ. J. Inorg. Chem. 52, 475 (2007). doi https://doi.org/10.1134/S003602360704002X
B. Weinstock, J. Malm, and E. Weaver, J. Am. Chem. Soc. 83, 4310 (1961). doi https://doi.org/10.1021/ja01482a002
S. N. Solov’ev, A. A. Korunov, K. G. Zubkov, et al., Russ. J. Phys. Chem. A, 86, 516 (2012). doi https://doi.org/10.1134/S0036024412030296
Author information
Authors and Affiliations
Corresponding author
Additional information
Russian Text © M.I. Nikitin, N.S. Chilingarov, A.S. Alikhanyan, 2019, published in Zhurnal Neorganicheskoi Khimii, 2019, Vol. 64, No. 3, pp. 302–307.
Rights and permissions
About this article
Cite this article
Nikitin, M.I., Chilingarov, N.S. & Alikhanyan, A.S. Thermochemistry of Cobalt Trifluoride. Russ. J. Inorg. Chem. 64, 377–382 (2019). https://doi.org/10.1134/S0036023619030136
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0036023619030136