Hi,
the .rtp

[ POL ]
[ atoms ]
  CAA  CH3    0.000
  CAB  CH2    0.000
  CAC  CH2    0.000
  CAD  CH2    0.000
  CAE  CH2    0.000
  CAF  CH2    0.000
  CAG  CH1    0.000
  CAH  CH2    0.041
  CAI  CH1    0.107
  CAJ    C    0.352
  OAK   OM   -0.750
  OAL   OM   -0.750
  CAM  CH2    0.044
  CAN    C    0.373
  OAO   OM   -0.709
  OAP   OM   -0.708
[ bonds ]
  CAA  CAB
  CAB  CAC
  CAC  CAD
  CAD  CAE
  CAE  CAF
  CAF  CAG
  CAG  CAH
  CAH  CAI
  CAI  CAJ
  CAI  CAM
  CAJ  OAK
  CAJ  OAL
  CAM  CAN
  CAN  OAO
  CAN  OAP
  CAG -CAM
[ impropers ]
  CAG  CAF -CAM  CAH
 -CAM -CAN -CAI  CAG
  CAJ  CAI  OAL  OAK
  CAN  CAM  OAP  OAO
  CAI  CAH  CAJ  CAM

--------------------------------------------------
From: "Justin A. Lemkul" <jalem...@vt.edu>
Sent: Wednesday, August 12, 2009 9:23 PM
To: "Discussion list for GROMACS users" <gmx-users@gromacs.org>
Subject: Re: [gmx-users] bad bond in polymer



nicegromacs wrote:
Hi,
 the bad bond appear in the topology (.top) file.


Then it is something you have added. If you want any useful advice, post the .rtp entries you are using.

-Justin

veduardo.

 Lab. de  Fisicoquímica Molecular
 Facultas de Ciencias
 Universidad de Chile

*From:* nicegromacs <mailto:nicegrom...@live.cl>
*Sent:* Wednesday, August 12, 2009 8:28 PM
*To:* gmx-users@gromacs.org <mailto:gmx-users@gromacs.org>
*Subject:* [gmx-users] bad bond in polymer

Hi gmx-users,

I am building a polymer and I've added the monomer unit to the .rtp file. The final structure appears with an undesired bond between the monomer units at the extremes of the polymer.
How can I prevent the monomers at the end forming the bond?

I have read other post like http://www.mail-archive.com/gmx-users@gromacs.org/msg21133.html but can not avoid this problem .

Thank you in advance

veduardo.

Lab. de  Fisicoquímica Molecular

Facultas de Ciencias

Universidad de Chile

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--
========================================

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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