1. Regarding the number of compounds in the NIST Chemistry WebBook, NIST Standard Reference Data Base Number 69, Eds. P.J. Linstrom and W.G. Mallard, National Institute of Standards and Technology, Gaithersburg MD 20899 http://www.nist.gov, Peter J. Linstrom, personal communication (September 4, 2013), referring to the chapter therein H.Y. Afeefy, J.F. Liebman, S.E. Stein, “Neutral Thermochemical Data”. With regards to the number of compounds in the Chemical Abstracts registry, the number of organic/inorganic registrations was found at the Chemical Abstracts website (www.cas.org) © American Chemical Society (accessed September 9, 2013) Also see, for example, H. Y. Afeefy, J.F. Liebman, S.W. Slayden, talk COMP-193 “Thermochemical data: There is more than you think but less than you need” presented at the 212th ACS National Meeting, Orlando, FL, August 24–29 (1996). Neither the conference presentation nor the NIST website included most of the increasing number of reactive neutral organic species that have been thermochemically characterized using ion-molecule reaction chemistry, e.g. the isomeric benzynes and other dehydrobenzenes, P.G. Wenthold, Aust. J. Chem., 63 (2010), 1091–1098.
2. Heats of combustion of organic compounds
3. The Chemical Thermodynamics of Organic Compounds;Stull,1969
4. Selected Values of Heats of Combustion and Heats of Formation of Organic Compounds Containing the Elements C, H, N, O, P, and S.
5. Additivity rules for the estimation of thermochemical properties