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Experimental and QSPR Studies on n-Octanol/water Partition Coefficient (lgKow) of Substituted Aniline
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Author(s): Dai, Y (Dai Yong); Jiang, JL (Jiang Jian-Lin); Wang, ZY (Wang Zun-Yao); Xue, Q (Xue Qun)
Title: Experimental and QSPR studies on n-octanol/water partition coefficient (IgK(ow)) of substituted aniline
Source: CHINESE JOURNAL OF STRUCTURAL CHEMISTRY, 26 (12): 1449-1454 2007
Language: English
Document Type: Article
Author Keywords: substituted aniline; n-octanol/water partition coefficient; shake-flask method; DFT; quantitative structure-property relationship (QSPR)
Keywords Plus: ENVIRONMENTAL-POLLUTANTS; DEGRADATION PRODUCTS; TOXICITY; PREDICTION; PARAMETERS; LGK(OW); DFT
Abstract: The n-octanol/water partition coefficients (IgK(ow)) of 18 substituted anilines were determined at 25 degrees C by sbake-flask method. The geometrical optimization of substituted anilines has been performed at B3LYP/6-311G** level with Gaussian98 program, and the molecular surface areas of substituted anilines were calculated using ChemOffice 2004 program. The calculated structural parameters of substituted anilines were used as theoretical descriptors and the two-parameter (molecular surface area (MA) and the energy of the highest occupied molecular orbital (E-HOMO)) quantitative structure-property relationship (QSPR) model of lgK(ow) for substituted aniline with molecular structural parameters was developed by multi-linear regression method. The regression coefficient square (r(2)) is 0.990 and the standard deviation SE 0.109. The model was validated by variance inflation factors (VIF) and t-test, and the results show that there exists small self-correlation between variables of the model with perfect stability. The model gives results in good qualitative agreement with experimental data. At last, the model was applied to predict lgK(ow) values of five substituted anilines whose IgK(ow) values have not been determined experimentally.
Addresses: Jiaxing Univ, Coll Biol & Chem Engn, Zhejiang 314001, Peoples R China; Yancheng Inst Technol, Dept Chem Engn, Jiangsu 224003, Peoples R China; Guilin Inst Technol, Dept Mat & Chem Engn, Guilin 541004, Guangxi, Peoples R China
Reprint Address: Wang, ZY, Jiaxing Univ, Coll Biol & Chem Engn, Zhejiang 314001, Peoples R China.
E-mail Address: wangzun315cn@163.com
Cited Reference Count: 17
Times Cited: 0
Publisher: CHINESE JOURNAL STRUCTURAL CHEMISTRY
Publisher Address: FUIJAN INST RES STRUCT MATTER, CHINESE ACAD SCIENCES, FUZHOU, FUJIAN 350002, PEOPLES R CHINA
ISSN: 0254-5861
29-char Source Abbrev.: CHIN J STRUCT CHEM
ISO Source Abbrev.: Chin. J. Struct. Chem.
Source Item Page Count: 6
Subject Category: Chemistry, Inorganic & Nuclear; Crystallography
ISI Document Delivery No.: 247SH

[ Last edited by glassman782 on 2008-2-14 at 15:49 ]
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