MM tors. param. for Ph-C(H)(C2H5)(Ph)



 Dear CLLers,
 
I'm looking for the Amber torsional parameter(s) associated to the bond connecting a phenyl ring to an aliphatic carbon atom, in the particular molecular context described hereafter: Ph-C(H)(C2H5)-Ph.
 I would appreciate your reply!
 Thank you in advance!
 best wishes,
 Andrea Tafi