!BIOSYM molecular_data 4
 
!Date: Tue Jul 02 12:42:23 2013   Materials Studio Generated MDF file
 
#topology

@column 1 element
@column 2 atom_type
@column 3 charge_group
@column 4 isotope
@column 5 formal_charge
@column 6 charge
@column 7 switching_atom
@column 8 oop_flag
@column 9 chirality_flag
@column 10 occupancy
@column 11 xray_temp_factor
@column 12 connections
 
@molecule ethane
 
XXXX_1:C1           C  c4      1     0  0    -0.0800 0 0 8 1.0000  0.0000 C2 H3 H4 H5 
XXXX_1:C2           C  c4      1     0  0    -0.0800 0 0 8 1.0000  0.0000 C1 H6 H7 H8 
XXXX_1:H3           H  h1      1     0  0     0.0270 0 0 8 1.0000  0.0000 C1 
XXXX_1:H4           H  h1      1     0  0     0.0270 0 0 8 1.0000  0.0000 C1 
XXXX_1:H5           H  h1      1     0  0     0.0270 0 0 8 1.0000  0.0000 C1 
XXXX_1:H6           H  h1      1     0  0     0.0270 0 0 8 1.0000  0.0000 C2 
XXXX_1:H7           H  h1      1     0  0     0.0270 0 0 8 1.0000  0.0000 C2 
XXXX_1:H8           H  h1      1     0  0     0.0270 0 0 8 1.0000  0.0000 C2 
 
!
#symmetry
@periodicity 3 xyz
@group (P1)

#end