Bonds don't break in gromacs without qm/mm ...yet. Why do you think
they're broken?
Erik
Nilesh Dhumal skrev:
Hello,
I am trying to calculate the normal vibrational spectra of glcuose
molecule in vaccum. After the energy minimization, I found all the bonds
are broken.
I have pasted the input file for energy minimzation.
WHy all bonds are geting broken.
Nilesh
define = -DFLEXIBLE
constraints = all-bonds
integrator = L-BFGS
nsteps = 15000
nbfgscorr = 50
emtol = .001
emstep = 0.1
gen_vel = yes
gen-temp = 300
nstcomm = 1
; NEIGHBORSEARCHING PARAMETERS
; nblist update frequency
nstlist =10
; ns algorithm (simple or grid)
ns-type = simple
; Periodic boundary conditions: xyz (default), no (vacuum)
; or full (infinite systems only)
pbc = no
; nblist cut-off
rlist = 0
domain-decomposition = no
; OPTIONS FOR ELECTROSTATICS AND VDW
; Method for doing electrostatics
coulombtype = Cut-Off
rcoulomb-switch = 0
rcoulomb = 0
; Dielectric constant (DC) for cut-off or DC of reaction field
; Method for doing Van der Waals
vdw-type = Cut-off
; Periodic boundary conditions: xyz (default), no (vacuum)
; or full (infinite systems only)
pbc = no
; nblist cut-off
rlist = 0
domain-decomposition = no
; OPTIONS FOR ELECTROSTATICS AND VDW
; Method for doing electrostatics
coulombtype = Cut-Off
rcoulomb-switch = 0
rcoulomb = 0
; Dielectric constant (DC) for cut-off or DC of reaction field
; Method for doing Van der Waals
vdw-type = Cut-off
--
-----------------------------------------------
Erik Marklund, PhD student
Dept. of Cell and Molecular Biology, Uppsala University.
Husargatan 3, Box 596, 75124 Uppsala, Sweden
phone: +46 18 471 4537 fax: +46 18 511 755
[email protected] http://folding.bmc.uu.se/
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