| [1] | L. P. Hammett., J. Am. Chem. Soc., vol. 59, page 96 (1937). |
| |
| [2] | L. P. Hammett., "Physical Organic Chemistry." McGraw Hill Book Co., Inc., New York, 1940, P. 184. |
| |
| [3] | H. H. Jaffe, Chem. Rev., 53, 191 (1953). |
| |
| [4] | P. R. Wells, Chem. Rev., 63, 171 (1963). |
| |
| [5] | R. W. Taft, J. Am. Chem. Soc., 74, 2729 and 3120 (1952). |
| |
| [6] | R. W. Taft, J. Am. Chem. Soc. 75, 4538, (1953). |
| |
| [7] | L. P. Hammett, Chem. Rev., vol. 17, 125, (1935). |
| |
| [8] | Corwin Hansch, A. Leo, and R. W. Taft, Chem. Rev., 91, 165-195 (199l). |
| |
| [9] | Imoto, E. and Motoyama, R., Bull. Naniwa Univ., Series A. 2. 127 (1954). |
| |
| [10] | F. Freeman, J. Chem. Edn., vol. 47, 140, (1970). |
| |
| [11] | W. E. Catlin, Iowa State Coll. J. Sci.,10, 65 (1935). |
| |
| [12] | Salo Gronowitz, Thiophene and its derivatives part 2 in The Chemistry of Heterocyclic Compounds, an Interscience publication, 1986 by John Wiley & sons, Inc. |
| |
| [13] | R. Sanjeev and V. Jagannadham, Current Physical Chemistry (Bentham Science), vol. 12, page 117-127, (2022). |
| |
| [14] | “The Chemistry of Heterocyclic Compounds”, by Grünanger Paolo, An Interscience publication, 1991, John Wiley & Sons. Page 114. |
| |
| [15] | “Lange's Handbook of Chemistry”, by John A. Dean, Fifteenth Edition McGraw-Hill, Inc., New York, Copyright renewed 1972 by Norbert Adolph Lange, please go directly to Section 9 to look for the equation. |
| |
| [16] | A. Kekulé, Justus Liebigs Ann. Der Chemie, Vol. 162, page 77-124, (1872), https://en.wikipedia.org/wiki/Benzene#cite_note-18. |
| |
| [17] | E. Schaumann, Science of Synthesis, Volume 11: Category 2, Hetarenes and Related Ring Systems, 2002. |
| |
| [18] | Guy Lamoureux and John F. Ogilvie, Journal of Chemical Reviews, Vol. 4, issue 2, pages 120-146, (2022). |
| |
| [19] | L. Melander, Ark. Kemi, 11, 397 (1957). |
| |
| [20] | Ram Keswani and Henry Freis, J. Am. Chem. Soc., 71, I789 (1949). |
| |
| [21] | (a) H. Spiesecke and W. G. Schneider, J. Chem. Phys., 35, 731 (1961), (b) Tetrahedron Letters, 468, (1961). |
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