; Self-contained top file representing a single TIP4P-Ew water molecule [ defaults ] ; nbfunc comb-rule gen-pairs fudgeLJ fudgeQQ 1 3 yes 0.5 0.5 [ atomtypes ] ; name bond_type mass charge ptype sigma epsilon MW MW 0 0.00000 0.000 D 0.00000e+00 0.00000e+00 HW_tip4pew 1 1.008 0.0000 A 0.00000e+00 0.00000e+00 OW_tip4pew 8 16.00 0.0000 A 3.16435e-01 6.80946e-01 [ moleculetype ] ; molname nrexcl SOL 2 [ atoms ] ; id at type res nr res name at name cg nr charge mass 1 OW_tip4pew 1 SOL OW 1 0 16.00000 2 HW_tip4pew 1 SOL HW1 1 0.52422 1.00800 3 HW_tip4pew 1 SOL HW2 1 0.52422 1.00800 4 MW 1 SOL MW 1 -1.04844 0.00000 [ settles ] ; i funct doh dhh 1 1 0.09572 0.15139 [ virtual_sites3 ] ; Vsite from funct a b 4 1 2 3 1 0.106676721 0.106676721 [ exclusions ] 1 2 3 4 2 1 3 4 3 1 2 4 4 1 2 3 [ molecules ] ; Compound #mols SOL 1