Statistical Study of Melting Point for Cephalosporin Derivatives
Abstract
Computational chemistry has been proving helpful in research and development. There are many methods which are employed in computational chemistry. QSAR/QSPR is one of the best tools out of them. QSPR follows vast number of statistical methods for developing model. Present paper emphasizes on use of Microsoft Excel software for developing statistical model for melting point of series of compounds belonging to class of cephalosporin antibiotic compounds. For development of statistical model or regression equation step wise, multiple regressions through forward selection were followed. As non-dependent variable/structural representative various topological, quantum mechanical, geometrical indices were calculated through suitable software and employed. For calculation of indices the 2D and 3D structures of molecules were prepared by Chemsketch software. Developed regression equation can be used to modify any one molecule of selected series or molecule belonging to cephalosporin class of molecule to gain required value of melting point. However, during modification of particular molecule a different MLR equation/model was derived (in terms of LD50) and hence considered for controlling or minimizing toxicity Keywords: QSPR, melting point, Microsoft excel, Pearson’s correlation, 3D-MoRSE, Weiner index, sum of Keir-hall topological stateReferences
Harary F. Graph Theory. AddisonWseley
Publication. 1998; 1–115p.
Balban AT, Ivanciuc O. Topological
Indices and Related Descriptors in
QSAR and QSPR. Gorden and Breach
Publication, Amsterdam. 1999; 59–
p.
Hofmann P. In: Solid State Physics-An
Introduction. Wiley-VCH. 2008. 3-24p
Brown RJC, Brown RFC. Journal of
Chemical Education. 2000; 77(6):
p.
Hofmann P. In: Solid State Physics-An
Introduction. Wiley-VCH. 2008. 45-
p
Lipnick RL, Cotruvo JA, Hill RN,
Bruce RD, Stitzel KA,
Walker AP, Chu I., Goddard M, Food
and chemical TOXICOLOGY, 1995;
(3), 223–31 P
ACDLAB product. ACD/ChemSketch,
version 12.0, for Microsoft.
Todeschini R, Consonni V. In:
Software for Calculation of Molecular
Descriptor. DRAGON Evaluation
verson 5.5, Talete srl, Milano
Chemometrics Italy, 2007.
Drake PP. In: Online Notes on
Regression Step-by-Step using
Microsoft Excel. James Madison
University. Accessed on 20 Oct 2012;
–5p.
Sharma RK, Sikarwar A, Sharma R, et
al. Prediction of Median Lethal Dose
by QSAR method with their
Applications. International Research
Journal of Engineering and
Technology. Jun 2015; 2(3): 994–
p.