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Calculation of critical temperatures from the number of carbons in organic molecules
Author(s) -
Fisher Charles H.
Publication year - 1990
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02540635
Subject(s) - extrapolation , homologous series , logarithm , interpolation (computer graphics) , linearity , series (stratigraphy) , organic molecules , simple (philosophy) , mathematics , thermodynamics , chain (unit) , carbon number , molecule , statistical physics , chemistry , materials science , physics , mathematical analysis , organic chemistry , quantum mechanics , classical mechanics , motion (physics) , paleontology , philosophy , epistemology , biology , alkyl
The linearity of homolog critical temperatures (T c ,K) with the logarithms of chain length (the latter represented by molecular weight, M, or number of carbons, N c ) was used to develop simple equations correlating T c ,K with M (or with N c +k) for 40 homologous series. Critical temperatures defined by the equations are presumed to be correct, whereas those in substantial disagreement are considered wrong. The equations can be used to estimate many new critical temperatures by interpolation or by prudent extrapolation.