The SCME model makes use of traceless moments and polarizabilities. All the traceless moments and polarizabilities satisfy the following identities: S8 dimer, we spanned the COM-COM distance from 2.83 Å to 5.17 Å over 25 points. For the head-to-tail dimer, we spanned the COM-COM distance from 5.33 Å to 7.00 Å in 22 points.