Hello,

I am trying to build poly(ethylene glycol). I've stated the number of backbone atoms as 5 in my z-matrix, but after running the build simulation, it shows my backbone number as 4, and all the oxygen atoms within the chain were replaced by carbons.

I have also tried uploading the monomer file as a pdb, but it did not recognize the structure properly.

Here is my z-matrix layout.

5    # Number of backbone atoms
H  
C       1        1.09503
C       2        1.51373     1      110.62525
O       3        1.41973     2      109.01246     1       59.41546
H       4        0.97242     3      107.06276     2      179.79454
H       2        1.09503     1      106.87400     3      120.51373
H       2        1.09356     1      108.82446     3      237.89766
H       3        1.09411     2      110.54754     1      299.87330
H       3        1.09410     2      110.54029     1      178.94552
 

Thanks