> how to calculate c6 & c12 coloumn for DMSO > thanx in advance Search for C6 and C12 for DMSO or for sigma and epsilon in the literature. -- Vitaly V. Chaban School of Chemistry National University of Kharkiv Svoboda sq.,4, Kharkiv 61077, Ukraine email: chaban at univer.kharkov.ua skype: vvchaban tel.: +38-097-8259698