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Citation: YAN Chao-Qun, WAN Hui, GUAN Guo-Feng. Prediction of Melting Points for 1,3-Disubstituent Imidazolium Ionic Liquids[J]. Acta Physico-Chimica Sinica, ;2008, 24(12): 2198-2202. doi: 10.3866/PKU.WHXB20081209 shu

Prediction of Melting Points for 1,3-Disubstituent Imidazolium Ionic Liquids

1.
College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, P. R. China

Received Date: 16 July 2008
Available Online: 3 November 2008

Quantitative structure-activity relationship (QSAR) was used to predict the melting points of two kinds of imidazolium ionic liquids. Using a genetic al rithm a three-parameter model with R2 =0.89 was set up for 16 imidazolium tetrafluoroborates and a four-parameter model with R2 =0.85 was developed for 22 imidazolium hexafluorophosphates. Internal reliability validation was performed using a leave-one-out approach with R2=0.82 for the model of imidazolium tetrafluoroborates and R2 =0.77 for the model of imidazolium hexafluorophosphates. To validate predictive abilities of models an external validation was performed for test sets where the mean absolute deviation were 11.43 and 7.78 K, respectively. These values are better than the values found in the literature. The proposed models can be used to predict melting points of imidazoliumionic liquids.
- QSAR,
- Imidazoliumionic liquids,
- Genetic al rithm,
- Melting point
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