Re: [gmx-users] How does x2top recognize between alkane C and alkene C

2015-07-16 Thread Justin Lemkul
On 7/16/15 12:47 AM, sridhar dwadasi wrote: Thank you for the response. In case of an all atom representation, the connections are different. What about a united atom representation? The g_x2top supports Gromacs 53a5 forcefield right? If you write an .n2t file for it, sure. Can we get a

Re: [gmx-users] How does x2top recognize between alkane C and alkene C

2015-07-16 Thread sridhar dwadasi
Hi Dr. Justin Lemkul, Thank you for responding again. I'm still not understanding it :(. I'll try to be more clear. Taking the example of OPLS UA, we have different atom types for united alkene atoms (-CH= and CH2=) and alkanes (-CH2-). When I represent the connections in n2t file, the

Re: [gmx-users] How does x2top recognize between alkane C and alkene C

2015-07-16 Thread Justin Lemkul
On 7/16/15 12:57 PM, sridhar dwadasi wrote: Hi Dr. Justin Lemkul, Thank you for responding again. I'm still not understanding it :(. I'll try to be more clear. Taking the example of OPLS UA, we have different atom types for united alkene atoms (-CH= and CH2=) and alkanes (-CH2-). When

[gmx-users] How does x2top recognize between alkane C and alkene C

2015-07-15 Thread sridhar dwadasi
Thank you for the response. In case of an all atom representation, the connections are different. What about a united atom representation? The g_x2top supports Gromacs 53a5 forcefield right? Can we get a topology with x2top only for an all atom representation? Or is there anyway to get it for

Re: [gmx-users] How does x2top recognize between alkane C and alkene C

2015-07-13 Thread Justin Lemkul
On 7/13/15 1:38 AM, sridhar dwadasi wrote: Dear gromac users, I'm using g_x2top (4.6.7 version), to generate a topology. The compound contains double bonds. I have a problem in setting correct topology. The C1 in both the cases -C1H=C2H2 and -C1H2- is being assigned the same type, though I'm

[gmx-users] How does x2top recognize between alkane C and alkene C

2015-07-12 Thread sridhar dwadasi
Dear gromac users, I'm using g_x2top (4.6.7 version), to generate a topology. The compound contains double bonds. I have a problem in setting correct topology. The C1 in both the cases -C1H=C2H2 and -C1H2- is being assigned the same type, though I'm mentioning different distances in the n2t file.