Atomic characteristic value of polychlorinated biphenyls(PCBs)were defined and calculated
based on which
a new orientating topological index and a new group corresponding index were acquired with the technique of molecule graphics.The multiple regression equations of quantitative structure-activity relationship(QSAR) for estimating lgSw and lgKow of PCBs were proposed
with the mean deviation parting was 0.12 and 0.34
respectively.The lgSw and lgKow of other 7 PCBs molecules were predicted with the regression equation
and the results show that the predicted values of 7 PCBs are in good agreement with the experimental data.