[01] Selcuk Gumus, Yuzuncu Yıl University, Faculty of Sciences, Department of Chemistry, Kampus, Van, Turkey. [02] Lemi Turker, Middle East Technical University, Faculty of Arts and Sciences, Department of Chemistry, Ankara, Turkey.

Topological indices have an important role in chemical graph theory. Description of chemical structure with a number provides being able to guess unmeasured properties of known and unknown compounds. (Turker-Gumus Index) TG Index has been described and its application on some physical properties of alkanes and alkenes have been reported. The TG Index is a novel index based on connectivity and distances in the graph of a molecular structure. The authors have tried to use TG index to model some important properties in alkanes and alkenes. The index is very well correlated with the applied properties with only a few exceptions.

TG Index, Topological Indices, T(A) Graphs, Alkanes, Alkenes

[01] N. Trinajstic, S. Nikolic, J.V. Knop, W.R. Müller, K. Szymanski, Computational Chemical Graph Theory, Simon and Schuster, Chichester, 1991. [02] D.H. Rouvray, in Chemical Applications of Graph Theory, (Ed: A.T. Balaban) Academic Press, London, 1976, p. 175. [03] J. Devillers, A.T. Balaban, Topological Indices and Related Descriptors in QSAR and QSPR. Gordon and Breach Science Publishers, Amsterdam, 1999. [04] H. Kopp, Ann. Chem. Pharm. 50 (1844) 71-144. [05] E. Heilbronner, The HMO Model and Its Application, Wiley, London, 1976. [06] J. Devillers, A.T. Balaban, Topological Indices and Related Descriptors in QSAR and QSPR. Gordon and Breach Science Publishers, Amsterdam, 1999. [07] F.S. Roberts, Discrete Mathematical Models. Prentice-Hall, CA, 1975. [08] M. Barysz, D. Plavsic, N. Trinajstic, Math. Chem. 19 (1986) 89-116. [09] D.E. Needham, I.C. Wei, P.G. Seybold, J. Am. Chem. Soc. 110 (1988) 4186-4194. [10] R. Sayre, The Molar Refraction of Liquid Organosilicon Compounds. J. Chem. Eng. Data, 9 (1964) 146-153. [11] K.G. Denbigh, Trans. Faraday Soc. 36 (1940) 936-948. [12] A.I. Vogel, J. Chem. Soc. (1948) 1833. [13] K.J. Miller, J.A. Savchic, J. Am. Chem. Soc. 101 (1979) 7206-7213. [14] R.R.Driesbach, Physical Properties of Chemical Compounds, Advances in Chemistry 22, American Chemical Society, Washington DC, 1959. [15] L. Pauling, D. Pressman, J. Am. Chem. Soc. 67 (1945) 1003-1003. [16] W.J. Dunn, Eur. J. Med. Chem.-Chim. Ther. 12 (1977) 109-112. [17] P.V. Khadikar, D. Mandloi, A.V. Bajaj, S. Joshi, Bioorg. Med. Chem. Lett. 13 (2003) 419-422. [18] P.V. Khadikar, S. Karmarkar, J. Chem. Inf. Comput. Sci. 41 (2001) 934-949. [19] H. Wiener, J. Am. Chem. Soc. 69 (1947) 17-20. [20] L.N. Mulay, A. Weissberger, B. W. Rossiter, Techniques of Chemistry 4, Wiley-Interscience, New York, 1972, p. 431. [21] R.E. Hoffman, J. Magn. Reson. 163 (2003) 325-331. [22] http://en.wikipedia.org/wiki/parachor, August 2009. [23] O. Exner, Nature, 196 (1962) 890-891. [24] T. Sakka, Y.H. Ogata, J. Fluorine Chem. 126 (2005) 371-375. [25] R.W. Taft, R.D. Topsom, Prog. Phys. Org. Chem. 16 (1987) 1. [26] R.W. Taft, Prog. Phys. Org. Chem. 14 (1983) 247-350. [27] R.W. Taft, I.A. Koppel, R.D. Topsom, F. Anivia, J. Am. Chem. Soc. 112 (1990) 2047-2052. [28] D.E. Needham, I.C. Wei, P.G. Seybold, J. Am. Chem. Soc. 110 (1988) 4186-4194. [29] A. Das, G. Domotor, I. Gutman, S. Joshi, S. Karmarkar, D. Khaddar, T. Khaddar, P.V. Khadikar, L. Popovic, N.S. Sapre, N. Sapre, A.A. Shirhatti, J. Serb. Chem. Soc. 62 (1997) 235-239. [30] T. Zeljko, I. Gutman, J. Chem. Inf. Comput. Sci. 41 (2001) 1041-1045. [31] G. Rücker, C. Rücker, J. Chem. Inf. Comput. Sci. 39 (1999) 788-802. [32] R.H. Rohrbaugh, P.C. Jurs, Anal. Chem. 57 (1985) 2770-2773. [33] P.J. Hansen, P.C. Jurs, Anal. Chem. 59 (1987) 2322-2327. [34] S. Liu, R. Zhang, M. Liu, Z.J. Hu, Chem. Info. Comput. Sci. 37 (1997) 1146-1151. [35] S.P. Verevkin, D. Wandschneider, A. Heintz, J. Chem. Eng. Data 45 (2000) 618-625. [36] S.D. Nelson, P.G. Seybold, J. Mol. Graph. and Model. 20 (2001) 36-53. [37] J.C. Dearden, in Advances in Quantitative Structure Property Relationships, (Ed: M. Charton), Vol. 2, J.A.I. Press, New York, 1999, pp. 127-175.