LAMMPS data file from msi2lmp v3.8 for ethane-class2a

      8 atoms
      7 bonds
     12 angles
      9 dihedrals
      8 impropers

   2 atom types
   2 bond types
   2 angle types
   1 dihedral types
   2 improper types

     0.214545000    10.214545000 xlo xhi
     0.114180000    10.114180000 ylo yhi
   -10.000145000    -0.000145000 zlo zhi

Masses

   1  12.011150
   2   1.007970

Pair Coeffs

   1   0.0620000000   3.8540000000 
   2   0.0230000000   2.8780000000 

Bond Coeffs

  1     1.5300   299.6700  -501.7700   679.8100 
  2     1.1010   345.0000  -691.8900   844.6000 

Angle Coeffs

  1   110.7700    41.4530   -10.6040     5.1290 
  2   107.6600    39.6410   -12.9210    -2.4318 

Dihedral Coeffs

  1    -0.1432     0.0000     0.0617     0.0000    -0.1530     0.0000

Improper Coeffs

  1     0.0000     0.0000 
  2     0.0000     0.0000 

BondBond Coeffs

  1     3.3872     1.5300     1.1010 
  2     5.3316     1.1010     1.1010 

BondAngle Coeffs

  1    20.7540    11.4210     1.5300     1.1010 
  2    18.1030    18.1030     1.1010     1.1010 

AngleAngle Coeffs

  1     0.2738    -0.4825     0.2738   110.7700   107.6600   110.7700 
  2    -0.3157    -0.3157    -0.3157   107.6600   107.6600   107.6600 

AngleAngleTorsion Coeffs

  1   -12.5640   110.7700   110.7700 

EndBondTorsion Coeffs

1     0.2130     0.3120     0.0777     0.2130     0.3120     0.0777     1.1010     1.1010 

MiddleBondTorsion Coeffs

  1   -14.2610    -0.5322    -0.4864     1.5300 

BondBond13 Coeffs

  1     0.0000     1.1010     1.1010 

AngleTorsion Coeffs

  1    -0.8085     0.5569    -0.2466    -0.8085     0.5569    -0.2466   110.7700   110.7700 

Atoms

      1      1   1 -0.080000     4.462910000     5.148330000    -5.000410000
      2      1   1 -0.080000     5.965490000     5.079930000    -4.999750000
      3      1   2  0.027000     4.099550000     6.054480000    -5.502500000
      4      1   2  0.027000     4.020330000     4.288350000    -5.519840000
      5      1   2  0.027000     4.057610000     5.156680000    -3.980190000
      6      1   2  0.027000     6.409980000     5.944880000    -4.490510000
      7      1   2  0.027000     6.329880000     4.179410000    -4.488110000
      8      1   2  0.027000     6.370610000     5.061380000    -6.019850000

Bonds

     1   1      1      2
     2   2      1      3
     3   2      1      4
     4   2      1      5
     5   2      2      6
     6   2      2      7
     7   2      2      8

Angles

     1   1      2      1      3
     2   1      2      1      4
     3   1      2      1      5
     4   2      3      1      4
     5   2      3      1      5
     6   2      4      1      5
     7   1      1      2      6
     8   1      1      2      7
     9   1      1      2      8
    10   2      6      2      7
    11   2      6      2      8
    12   2      7      2      8

Dihedrals

     1   1      3      1      2      6
     2   1      3      1      2      7
     3   1      3      1      2      8
     4   1      4      1      2      6
     5   1      4      1      2      7
     6   1      4      1      2      8
     7   1      5      1      2      6
     8   1      5      1      2      7
     9   1      5      1      2      8

Impropers

     1   1      2      1      3      4 
     2   1      2      1      3      5 
     3   1      2      1      4      5 
     4   2      3      1      4      5 
     5   1      1      2      6      7 
     6   1      1      2      6      8 
     7   1      1      2      7      8 
     8   2      6      2      7      8