&FORCE_EVAL
  METHOD FIST
  &MM
    &FORCEFIELD
      &CHARGE
        ATOM C
        CHARGE 0.0
      &END CHARGE
      &CHARGE
        ATOM H
        CHARGE 0.0
      &END CHARGE
      &CHARGE
        ATOM Cl
        CHARGE 0.0
      &END CHARGE
      &CHARGE
        ATOM Br
        CHARGE 0.0
      &END CHARGE
      &BOND
        ATOMS C H
        K [au_e*au_l^-2] 0.0
        R0 [au_l] 1.91807202593
      &END BOND
      &BOND
        ATOMS C Cl
        K [au_e*au_l^-2] 0.0
        R0 [au_l] 1.91807202593
      &END BOND
      &BOND
        ATOMS C Br
        K [au_e*au_l^-2] 0.0
        R0 [au_l] 1.91807202593
      &END BOND
      &BEND
        ATOMS Br C H
        K [au_e*rad^-2] 0.0
        THETA0 [rad] 0.0
      &END BEND
      &BEND
        ATOMS Br C Cl
        K [au_e*rad^-2] 0.0
        THETA0 [rad] 0.0
      &END BEND
      &BEND
        ATOMS Cl C H
        K [au_e*rad^-2] 0.0
        THETA0 [rad] 0.0
      &END BEND
      &IMPROPER
        KIND HARMONIC
        ATOMS C Cl Br H
        K [au_e*rad^-2] 0.5
        PHI0 [rad] 1.34
      &END IMPROPER
      &NONBONDED
        &LENNARD-JONES
          ATOMS C C
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS C H
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS C Cl
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS C Br
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS H H
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS H Br
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS H Cl
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS Br Br
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS Br Cl
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS Cl Cl
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
      &END NONBONDED
      &NONBONDED14   
        &LENNARD-JONES
          ATOMS C C
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS C H
        SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS C Cl
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS C Br
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS H H
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS H Br
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS H Cl
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS Br Br
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS Br Cl
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
        &LENNARD-JONES
          ATOMS Cl Cl
          SIGMA [au_l] 1.0
          EPSILON [au_e] 0.0
        &END LENNARD-JONES
      &END NONBONDED14     
    &END FORCEFIELD
    &POISSON
      PERIODIC none
      &EWALD
        EWALD_TYPE none
      &END EWALD
    &END POISSON
  &END MM
  &SUBSYS
    &CELL
      ABC [angstrom] 25.9457 25.9457 25.9457
    &END CELL
    &COORD
      Br        -1.45470        0.99560       -0.57390
      Cl        -0.18290       -1.68550       -0.47690
      C          0.00000        0.00000        0.00000
      H          0.10430        0.07370        1.01100
    &END COORD
    &TOPOLOGY
      CONNECTIVITY UPSF
      CONN_FILE_NAME ../sample_psf/imp_test.psf
    &END TOPOLOGY
  &END SUBSYS
&END FORCE_EVAL
&GLOBAL
  PROJECT imp_test_11
  RUN_TYPE DEBUG
  PRINT_LEVEL LOW
&END GLOBAL
&DEBUG
&END
