### Abstract

A new method least square-support vector machine (LS-SVM) was used to develop quantitative structure-property relationship (QSPR) models for predicting the logarithmic of n-octanol/water partition coefficient (log P) of some derivatives phenolic compounds. The calibration and predictive ability of LS-SVM were investigated and compared with those of three other methods; multiple linear regression (MLR), support vector linear regression (SVR) and artificial neural network (ANN). The results showed that the log P values calculated by LS-SVM were in good agreement with experimental values, and the performances of the LS-SVM models were comparable or superior to those of MLR, SVR and ANN methods. The root-mean-square errors of the training set and the predicting set for the LS-SVM model were 0.0855, 0.0746 and the squares of the correlation coefficients were 0.9960 and 0.9728, respectively. These values and other statistical parameters obtained for the LS-SVM model show the reliability of this model. LS-SVM is a new and effective method for predicting log P of some organic compounds, and can be used as a powerful chemometrics tool for QSPR studies.

Original language | English (US) |
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Pages (from-to) | 2525-2535 |

Number of pages | 11 |

Journal | Molecular Physics |

Volume | 106 |

Issue number | 21-23 |

DOIs | |

State | Published - Nov 1 2008 |

### Keywords

- Artificial neural network
- Least square-support vector machine
- MLR
- Quantitative structure-property relationship
- Support vector regression

### ASJC Scopus subject areas

- Biophysics
- Molecular Biology
- Condensed Matter Physics
- Physical and Theoretical Chemistry