[gmx-users] the broken of the molecules
kecy_wu at sina.com
kecy_wu at sina.com
Mon Sep 6 10:25:19 CEST 2010
Hello, I do the energy minimization of the butylene box , but some butylene molecules are broken after that. The butylene itp file is produced by PRODRG, as follows:
[ moleculetype ]
; Name nrexcl
BUT 3
[ atoms ]
; nr type resnr resid atom cgnr charge mass
1 CH3 1 BUT C9 1 0.0049 15.0350
2 CH2 1 BUT C6 1 -0.02442 14.0270
3 C 1 BUT C3 1 0.07957 13.0190
4 C 1 BUT C2 1 -0.06005 14.0270
[ bonds ]
; ai aj fu c0, c1, ...
2 1 2 0.155 7150000.0 0.155 7150000.0 ; C6 C9
2 3 2 0.153 7150000.0 0.153 7150000.0 ; C6 C3
3 4 2 0.135 7150000.0 0.135 7150000.0 ; C3 C2
[ pairs ]
; ai aj fu c0, c1, ...
1 4 1 ; C9 C2
[ angles ]
; ai aj ak fu c0, c1, ...
1 2 3 2 112.5 520.0 112.5 520.0 ; C9 C6 C3
2 3 4 2 125.0 610.0 125.0 610.0 ; C6 C3 C2
[ dihedrals ]
; ai aj ak al fu c0, c1, m, ...
1 2 3 4 1 0.0 1.0 6 0.0 1.0 6 ; dih C9 C6 C3 C2
Can you show me why the butylene molecules would be broken?
Thank you very much !
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