Fluorine critical constants

Flash point see Flammability Flattening factor for the earth, 14-1 Fluorescent Indicators, 8-18 to 19 Fluorine see also Elements critical constants, 6-39 to 58 electron configuration, 1-18 to 19 heat capacity, 4-135 history, occurrence, uses, 4-1 to 42 ionization energy, 10-203 to 205 isotopes and their properties, 11-56 to 253 physical properties, 4-133 to 134 thermodynamic properties, 5-1 to 3 thermodynamic properties at high temperature, 5-43 to 65 vapor pressure, 6-61 to 90,6-91 to 98 Fluorocarbon refrigerants, 6-133 to 135 Foods... 

Acknowledgements. The authors are indebted to Prof. P. Hagenmuller and Dr. J. Portier for their constant interest they took in this work. Profs. D. Babel, K. Hirakawa, D. Reinen, Drs. J. Darriet, G. Le Flem, R. Sabatier, and J. L. Soubeyroux are thanked for their helpful discussions and Mr. B. Ellis for his critical reading of the english language of the manuscript. The authors also wish to thank the members of the Fluorine Research Group in Bordeaux, especially Prof. J. Grannec and L. Lozano. 

Critical examination of the coupling constants for the triptycene derivatives, LXIII and LXIV, suggests not only that the direct interaction is important but also that the sign of the coupling constant in this case is negative (55b). In other work, Kulkarni and Trapp investigated the esr spectra of fluorine atom derivatives of the triphenylmethyl and diphenylketyl radicals (131,132). Their observations are presented in Table 22. 

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