The Only Stable Organic Sigma Radicals: Di-tert-Alkyliminoxyls - Stable Radicals: Fundamentals and Applied Aspects of Odd-Electron Compounds - page 244

31. J. J. Cornejo, K. D. Larson, and G. D. Mendenhall, J. Org. Chem. , 50 , 5382 - 5383 (1985).

32. S. W. Benson, Thermochemical Kinetics , 2nd edn, John Wiley & Sons, Inc., New York (1976).

33. J. M. Mayer, D. A. Hrovat, J. L. Thomas, and W. T. Borden, J. Am. Chem. Soc. , 124 , 11142 -11147 (2002).

34. G. A. DiLabio and E. R. Johnson, J. Am. Chem. Soc. , 129 , 6199 -6203 (2007).

35. G. D. Mendenhall and K. U. Ingold, J. Am. Chem. Soc. , 95 , 627 - 628 (1973).

36. R. W. Taft, Jr., in Steric Effects in Organic Chemistry (ed. M. S. Newman), John Wiley & Sons, Inc., New York,

Chapter 13 (1956).

37. K. U. Ingold, J. Phys. Chem. , 64 , 1636 -1642 (1960).

38. In this connection, it is interesting to note that acyclic di- tert -alkyl nitroxides that are more sterically crowded

than (Me 3 C) 2 NO • .also have a reduced stability due to intramolecular hydrogen atom abstractions. Private com-
munication from the late Professor Andre Rassat.

39. D. Lindsay, E. C. Horswill, D. W. Davidson, and K. U. Ingold, Can. J. Chem. , 52 , 3554 - 3556 (1974).