How big is your system?=C2=A0 6-31G/++** seems like a= whopping big basis set to me.=C2=A0 Also for solvation studies one might f= irst try 6-31G*, and add basis functions as seems appropriate.

John

O= n Wed, Sep 17, 2014 at 9:12 AM, Daniel daniel danielkimia2004*yahoo.com <owner-chemistry[A]ccl.net> wrote:
Hi= ,

Maybe it may help
1. I = am asking weather this order is correct or not?
you can put in any order fr= eely
2. can I use a solvent except sol= vents in gaussian09?
Yes, by specif= y the dielectric constant

=C2=A0
Daniel
Universit=C3=A9 de Gen=C3=A8ve, Switzerlan= d

On Wednesday, 10 September 2014, 8:23, fateme sa= bzalizade fatemesabzalizade=3Dgmail.com <owner-chemistry%ccl.net> wrote:

Hi friends
I am wo= rking on biomolecule intraction. I have optimized the structure of two my c= ompound in both vacuum as well as solvent(PCM and cpcm model) using b3lyp/6= -311++G** basis.for cpcm model I using syntax
# b3lyp/6-311++g** opt fre= q scrf=3D(cpcm,solvent=3DH2O)
I have several questions about using from = Gaussian:
1. I am asking weather this order is correct or not?
2. can= I use a solvent except solvents in gaussian09?
3. How I can study biomolecule intraction in na= tural condition?
4. How I study exchange structural?

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