From owner-chemistry@ccl.net Tue Aug 21 03:14:01 2007 From: "soumya samineni soumya_samineni^-^rediffmail.com" To: CCL Subject: CCL: surface construction Message-Id: <-34960-070821030944-32440-bCIx+G3ltLy1bhp6NBoEIA_+_server.ccl.net> X-Original-From: "soumya samineni" Date: Tue, 21 Aug 2007 03:09:37 -0400 Sent to CCL by: "soumya samineni" [soumya_samineni : rediffmail.com] I have made a 111 surface of FCC metal with 3X3 atoms. now i would like to adsorb Si over it with different coverages. how can i do that ..? (single Si prefres HCP site) Can some one send me the coordinates for different coverages that you would have generated for ur studies. thanx in advace soumya From owner-chemistry@ccl.net Tue Aug 21 04:57:01 2007 From: "Egon Willighagen egon.willighagen**gmail.com" To: CCL Subject: CCL: Open Source 3D coordinate generation tool Message-Id: <-34961-070821044951-17511-NOMRagMlHv97xt5EuExcvQ+*+server.ccl.net> X-Original-From: "Egon Willighagen" Content-Disposition: inline Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=ISO-8859-1 Date: Tue, 21 Aug 2007 08:54:19 +0200 MIME-Version: 1.0 Sent to CCL by: "Egon Willighagen" [egon.willighagen~~gmail.com] Dear Rajarshi, On 8/20/07, Rajarshi Guha rguha^^indiana.edu wrote: > Sent to CCL by: Rajarshi Guha [rguha===indiana.edu] > The program and instructions of compiling and usage can be obtained > from http://www.chembiogrid.org/cheminfo/smi23d/ is the service also available via SOAP? Egon -- ---- http://chem-bla-ics.blogspot.com/ From owner-chemistry@ccl.net Tue Aug 21 08:59:00 2007 From: "Jon Lyon jtl3z]~[virginia.edu" To: CCL Subject: CCL: conversion to xyz Message-Id: <-34962-070821075507-15804-2MQoujLY+47KVWgYVJ67Yg---server.ccl.net> X-Original-From: "Jon Lyon" Date: Tue, 21 Aug 2007 07:55:02 -0400 Sent to CCL by: "Jon Lyon" [jtl3z*_*virginia.edu] Does anyone know of a program (or have a script) to convert the atomic distances of a molecule to an xyz file (or z-matrix)? Thanks if advance From owner-chemistry@ccl.net Tue Aug 21 09:33:00 2007 From: "Richard Leo Wood woodx278[-]umn.edu" To: CCL Subject: CCL: Fractional coordinates to cartesian Message-Id: <-34963-070821091333-12765-116502yWuftdgcGlQPaK1A%x%server.ccl.net> X-Original-From: "Richard Leo Wood" Date: Tue, 21 Aug 2007 09:13:29 -0400 Sent to CCL by: "Richard Leo Wood" [woodx278 ~~ umn.edu] Hi all, Do any of you know of any program (free?) that will convert fractional coordinates to cartesian coordinates? If not in a program, is there a method that can be used to do it? I spent most of yesterday searching for something, but I came up empty. I have a few crystal structures in fractional coordinates (in papers, so I don't have them in electronic format) that I need converted to cartesian to compare them to some calculations that I have done. TIA, Richard Richard L. Wood, Ph. D. University of Minnesota Dept. of Medicinal Chemistry, College of Pharmacy 717 Delaware St. SE Minneapolis, MN 55414-2959 woodx278|*|umn.edu From owner-chemistry@ccl.net Tue Aug 21 11:28:00 2007 From: "Saman Alavi saman.alavi-,-nrc.ca" To: CCL Subject: CCL: Fractional coordinates to cartesian Message-Id: <-34964-070821112249-24771-D7zuo+GS+2jQeIZKLozYSQ ~ server.ccl.net> X-Original-From: Saman Alavi Content-Type: multipart/alternative; boundary="------------090904090701090107080502" Date: Tue, 21 Aug 2007 10:50:42 -0400 MIME-Version: 1.0 Sent to CCL by: Saman Alavi [saman.alavi() nrc.ca] This is a multi-part message in MIME format. --------------090904090701090107080502 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi Richard, Can you find the fractional coordinates in the cif formate? If so, you can use Mercury to read the file and output the data as cartesian coordinates. If not, the conversion is rather straightforward to do by hand. I can send you a short Word Document on how the conversion is done with knowledge of the unit cell vectors. Basically, the fractional coordinates show the fraction of each unit cell vector that contributes to the position of that atom. x_cart = *A*_x * frac_a + *B*_x * frac_b + *C_x* * frac_c y_cart = *A*_y * frac_a + *B*_y * frac_b + *C_y* * frac_c z_cart = *A*_z * frac_a + *B*_z * frac_b + *C_z* * frac_c where *A*, *B*, and *C* are the unit cell vectors and *A*_x is the x-coordinate of unit cell vector *A*. best regards, Saman Richard Leo Wood woodx278[-]umn.edu wrote: > Sent to CCL by: "Richard Leo Wood" [woodx278 ~~ umn.edu] > Hi all, > > Do any of you know of any program (free?) that will convert fractional coordinates to cartesian coordinates? If not in a program, is there a method that can be used to do it? I spent most of yesterday searching for something, but I came up empty. > > I have a few crystal structures in fractional coordinates (in papers, so I don't have them in electronic format) that I need converted to cartesian to compare them to some calculations that I have done. > > TIA, > Richard > > > Richard L. Wood, Ph. D. > University of Minnesota > Dept. of Medicinal Chemistry, > College of Pharmacy > 717 Delaware St. SE > Minneapolis, MN 55414-2959 > woodx278[]umn.edu> > > > > --------------090904090701090107080502 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Richard,

Can you find the fractional coordinates in the cif formate? If so, you can use Mercury to read the file and output the data as cartesian coordinates.

If not, the conversion is rather straightforward to do by hand. I can send you a short Word Document on how the conversion is done with knowledge of the unit cell vectors. Basically, the fractional coordinates show the fraction of each unit cell vector that contributes to the position of that atom.

   x_cart = A_x * frac_a  + B_x * frac_b + C_x * frac_c
   y_cart = A_y * frac_a  + B_y * frac_b + C_y * frac_c
   z_cart = A_z * frac_a  + B_z * frac_b + C_z * frac_c

where A, B, and C are the unit cell vectors and A_x is the x-coordinate of unit cell vector A.

best regards,
Saman

Richard Leo Wood woodx278[-]umn.edu wrote:
Sent to CCL by: "Richard Leo Wood" [woodx278 ~~ umn.edu]
Hi all,

Do any of you know of any program (free?) that will convert fractional coordinates to cartesian coordinates?  If not in a program, is there a method that can be used to do it?  I spent most of yesterday searching for something, but I came up empty.

I have a few crystal structures in fractional coordinates (in papers, so I don't have them in electronic format) that I need converted to cartesian to compare them to some calculations that I have done.

TIA,
Richard


Richard L. Wood, Ph. D.
University of Minnesota
Dept. of Medicinal Chemistry,
College of Pharmacy
717 Delaware St. SE
Minneapolis, MN 55414-2959
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--------------090904090701090107080502-- From owner-chemistry@ccl.net Tue Aug 21 12:17:01 2007 From: "Geoffrey Hutchison geoffh(!)pitt.edu" To: CCL Subject: CCL: Fractional coordinates to cartesian Message-Id: <-34965-070821114158-1264-SmRlYB83LpOK2h4hnl+Uww-#-server.ccl.net> X-Original-From: Geoffrey Hutchison Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Date: Tue, 21 Aug 2007 10:30:03 -0400 Mime-Version: 1.0 (Apple Message framework v752.2) Sent to CCL by: Geoffrey Hutchison [geoffh!=!pitt.edu] > I have a few crystal structures in fractional coordinates (in > papers, so I don't have them in electronic format) that I need > converted to cartesian to compare them to some calculations that I > have done. Open Babel supports a "free-form fractional" file format for exactly this purpose. You can convert them to whatever output format with babel. (I had exactly the same problem, which is why it's supported.) http://openbabel.sourceforge.net/wiki/Free_Form_Fractional Cheers, -Geoff ------------------------------------------- Geoff Hutchison Assistant Professor University of Pittsburgh, Department of Chemistry 219 Parkman Avenue Pittsburgh, PA 15260 From owner-chemistry@ccl.net Tue Aug 21 12:58:02 2007 From: "Close, David M. CLOSED()mail.etsu.edu" To: CCL Subject: CCL: Fractional coordinates to cartesian Message-Id: <-34966-070821114457-3037-ZBNo5/PuRXyy5Hfd3L33lw:+:server.ccl.net> X-Original-From: "Close, David M." Content-class: urn:content-classes:message Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="us-ascii" Date: Tue, 21 Aug 2007 10:22:21 -0400 MIME-Version: 1.0 Sent to CCL by: "Close, David M." [CLOSED=mail.etsu.edu] Richard: This is very easy to do in BABEL. You can find BABEL on in www, and it is easy to set up in Windows or UNIX. Then just use a one line command: Babel -if sourcename -ox outputname Where -i means input, f means fractional and -o means output and x means xyz. In your second paragraph you mention a common problem with old crystal papers. It is a real pain to have to type in the xyz coordinates. But these can be found in sites like the Cambridge or the PDB at Rutgers. Regards, Dave Close. -----Original Message----- > From: owner-chemistry*ccl.net [mailto:owner-chemistry*ccl.net] Sent: Tuesday, August 21, 2007 9:13 AM To: Close, David M. Subject: CCL: Fractional coordinates to cartesian Sent to CCL by: "Richard Leo Wood" [woodx278 ~~ umn.edu] Hi all, Do any of you know of any program (free?) that will convert fractional coordinates to cartesian coordinates? If not in a program, is there a method that can be used to do it? I spent most of yesterday searching for something, but I came up empty. I have a few crystal structures in fractional coordinates (in papers, so I don't have them in electronic format) that I need converted to cartesian to compare them to some calculations that I have done. TIA, Richard Richard L. Wood, Ph. D. University of Minnesota Dept. of Medicinal Chemistry, College of Pharmacy 717 Delaware St. SE Minneapolis, MN 55414-2959 woodx278[]umn.eduhttp://www.ccl.net/cgi-bin/ccl/send_ccl_messagehttp://www.ccl.net/chemistry/sub_unsub.shtmlhttp://www.ccl.net/spammers.txt From owner-chemistry@ccl.net Tue Aug 21 13:43:01 2007 From: "Igor Filippov Contr igorf(!)helix.nih.gov" To: CCL Subject: CCL: Open Source 3D coordinate generation tool Message-Id: <-34967-070821124452-9398-6FSp5qT5fshJ0OD9khptIQ]|[server.ccl.net> X-Original-From: "Igor Filippov [Contr]" Content-Transfer-Encoding: 7bit Content-Type: text/plain Date: Tue, 21 Aug 2007 12:44:25 -0400 Mime-Version: 1.0 Sent to CCL by: "Igor Filippov [Contr]" [igorf .. helix.nih.gov] Rajarshi, This is a great development, and I'm sure it will be welcomed by many! Congratulations! A couple questions: - Is there any specific reason for Apache license? Do you think it might present difficulties for people who'd like to include this project in their GPL code? - smi2sdf program seems to include an empty "name" property in the sd output, and mengine has an empty "title" property - it might confuse some other programs. - mengine seems to miss empty lines between the properties it adds, for example: > 103.559373 > 2.838407 > 2.325000 > Cs > 176.5185858.3 251.5937198.3 356.2962958.3 > 321.6609508.3 322.2533578.3 108.7103818.3 289.8413708.3 71.9372568.3 I could be wrong, but it might also cause problems with some third party tools... Best regards and keep up the good work :) Igor On Mon, 2007-08-20 at 15:12 -0400, Rajarshi Guha rguha^^indiana.edu wrote: > Sent to CCL by: Rajarshi Guha [rguha===indiana.edu] > Hi, > we have released a 3D coordinate generation tool called smi23d > which will convert a SMILES string to a 3D structure. The program > consists of two separate components: smi2sdf which converts a SMILES > string to a 'rough' set of 3D coordinates using the stochastic > proximity embedding (SPE) algorithm. Given the initial rough > coordinates, the program called mengine then optimizes them using the > MMFF94 forcefield to give a reasonable low energy structure. > > Note: these programs will only generate a single 3D structure. > > The code is written in C and is currently in the form of two > standalone programs. In the future we plan to convert it to a library > to ease inclusion within other systems. The software is released > under the Apache 2.0 license. > > The program and instructions of compiling and usage can be obtained > > from http://www.chembiogrid.org/cheminfo/smi23d/ > > At this point we have not performed significant benchmarking, mainly > due to lack of access to other programs. However we welcome any > comparisons with other programs and would be happy to help out in > such efforts. > > We have used smi3d to convert about 99% of PubChem to 3D, the results > of which are stored in a database which can be accessed at http:// > www.chembiogrid.org/cheminfo/p3d/. > > ------------------------------------------------------------------- > Rajarshi Guha > GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04 06F7 1BB9 E634 9B87 56EE > ------------------------------------------------------------------- > Despite the high cost of living, it remains popular. From owner-chemistry@ccl.net Tue Aug 21 14:03:01 2007 From: "Shrinwantu Pal paul++jncasr.ac.in" To: CCL Subject: CCL:G: solvent scipcm Message-Id: <-34968-070821054349-8480-dkjwq3nhUP+ilLT9vJfziA{=}server.ccl.net> X-Original-From: "Shrinwantu Pal" Content-Transfer-Encoding: 8bit Content-Type: text/plain;charset=iso-8859-1 Date: Tue, 21 Aug 2007 15:18:55 +0530 (IST) MIME-Version: 1.0 Sent to CCL by: "Shrinwantu Pal" [paul ~~ jncasr.ac.in] Dear CCLers, i am running a solvent calculation in Gaussian 03 with SCRF SCIPCM model and THF as the solvent. But the job gets killed saying: "WARNING! Serious error in surface integrals. Nuclear flux = 98.27 Qnuc = 100.00 Error in int = 0.00 It is probable that some of the solute is outside the cavity and/or parts of the cavity surface cannot be reached from the origin. Try more integration points or a different set of integration origins. Surface Problems in SciFoc" i have no clue.. how can i increase the integration points? how much does the cavity include? i will really be indebted for any advice. Shrinwantu Pal TSU JNCASR India From owner-chemistry@ccl.net Tue Aug 21 14:41:01 2007 From: "Rajarshi Guha rguha!^!indiana.edu" To: CCL Subject: CCL: Open Source 3D coordinate generation tool Message-Id: <-34969-070821091741-14746-Yn2ul88nuJd1q4m2zSe40g]![server.ccl.net> X-Original-From: Rajarshi Guha Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Date: Tue, 21 Aug 2007 07:38:30 -0400 Mime-Version: 1.0 (Apple Message framework v752.3) Sent to CCL by: Rajarshi Guha [rguha^-^indiana.edu] On Aug 21, 2007, at 2:54 AM, Egon Willighagen egon.willighagen**gmail.com wrote: > > Sent to CCL by: "Egon Willighagen" [egon.willighagen~~gmail.com] > Dear Rajarshi, > > On 8/20/07, Rajarshi Guha rguha^^indiana.edu ccl.net> wrote: >> Sent to CCL by: Rajarshi Guha [rguha===indiana.edu] >> The program and instructions of compiling and usage can be obtained >> from http://www.chembiogrid.org/cheminfo/smi23d/ > > is the service also available via SOAP? No, we haven't put the 3D structure generator up as a service yet. ------------------------------------------------------------------- Rajarshi Guha GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04 06F7 1BB9 E634 9B87 56EE ------------------------------------------------------------------- Entropy isn't what it used to be. From owner-chemistry@ccl.net Tue Aug 21 17:25:01 2007 From: "Michel Petitjean ptitjean#itodys.jussieu.fr" To: CCL Subject: CCL: conversion to xyz Message-Id: <-34970-070821172119-26970-5cY3l86rit5A2Rgsg74OWQ:+:server.ccl.net> X-Original-From: Michel Petitjean Date: Tue, 21 Aug 2007 23:21:06 +0200 (MEST) Sent to CCL by: Michel Petitjean [ptitjean(-)itodys.jussieu.fr] To: chemistry],[ccl.net Subject: CCL: Re: conversion to xyz Look at "multidimensional scaling" with google: it is the algorithm converting a n*n distance matrix (well, the matrix is symmetric and its diagonal elements are null) into a n*d matrix of cartesian coordinates, assuming that the distances are measured in the d-dimensional euclidean space. Here you have to set d=3. For those who are interested to use the method with distances issued from a connex molecular graph, note that the multidimensional scaling needs euclidean distances. Adding a constant to the distances (as recommended in some books when the distance is not euclidean) permits to run the algorithm, but the coordinates generated for molecular graphs after projection in a 3D space give a rather poor result. Michel Petitjean, Email: petitjean],[itodys.jussieu.fr ITODYS (CNRS, UMR 7086) 1 rue Guy de la Brosse Phone: +33 (0)1 44 27 48 57 75005 Paris, France. FAX : +33 (0)1 44 27 68 14 http://petitjeanmichel.free.fr/itoweb.petitjean.shape.html Sent to CCL by: "Jon Lyon" [jtl3z*_*virginia.edu] > Does anyone know of a program (or have a script) to convert the atomic distances of a molecule to an xyz file (or z-matrix)? > > Thanks if advance From owner-chemistry@ccl.net Tue Aug 21 18:11:01 2007 From: "LI Daobing lidaobing+ccl|-|gmail.com" To: CCL Subject: CCL: conversion to xyz Message-Id: <-34971-070821180911-17783-wFg8JQggROeJHogp6+mtQA.:.server.ccl.net> X-Original-From: "LI Daobing" Content-Disposition: inline Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=ISO-8859-1 Date: Wed, 22 Aug 2007 06:08:49 +0800 MIME-Version: 1.0 Sent to CCL by: "LI Daobing" [lidaobing+ccl()gmail.com] On 8/22/07, Michel Petitjean ptitjean#itodys.jussieu.fr wrote: > > Sent to CCL by: Michel Petitjean [ptitjean(-)itodys.jussieu.fr] > To: chemistry_+_ccl.net > Subject: CCL: Re: conversion to xyz > > Look at "multidimensional scaling" with google: it is the algorithm > converting a n*n distance matrix (well, the matrix is symmetric and > its diagonal elements are null) into a n*d matrix of cartesian > coordinates, assuming that the distances are measured in the > d-dimensional euclidean space. > Here you have to set d=3. > For those who are interested to use the method with distances > issued from a connex molecular graph, note that the multidimensional > scaling needs euclidean distances. Adding a constant to the > distances (as recommended in some books when the distance > is not euclidean) permits to run the algorithm, but the > coordinates generated for molecular graphs after projection > in a 3D space give a rather poor result. > > Michel Petitjean, Email: petitjean_+_itodys.jussieu.fr > ITODYS (CNRS, UMR 7086) > 1 rue Guy de la Brosse Phone: +33 (0)1 44 27 48 57 > 75005 Paris, France. FAX : +33 (0)1 44 27 68 14 > http://petitjeanmichel.free.fr/itoweb.petitjean.shape.html > > Sent to CCL by: "Jon Lyon" [jtl3z*_*virginia.edu] > > Does anyone know of a program (or have a script) to convert the atomic distances of a molecule to an xyz file (or z-matrix)? > > In a common case(for example, data from NMR), the full matrix of distance is not available. under this case, you should consider distance geometry, there is a small review in the book of A.R. Leach(Molecular Modelling, Principles and Applications, 2nd Ed., A. R. Leach, 2001, Section 9.5) I also remember concoord[1] can deal with this problem, but I am not sure. [1] http://www.mpibpc.gwdg.de/groups/de_groot/concoord/ -- LI Daobing From owner-chemistry@ccl.net Tue Aug 21 21:13:00 2007 From: "Siegfried Hoefinger shoefing(0)mtu.edu" To: CCL Subject: CCL:G: polch_2.1 Message-Id: <-34972-070821145525-16869-pT6mV+gSJBoRYgYIYPaYxA|-|server.ccl.net> X-Original-From: "Siegfried Hoefinger" Date: Tue, 21 Aug 2007 14:55:22 -0400 Sent to CCL by: "Siegfried Hoefinger" [shoefing##mtu.edu] Dear all, POLCH 2.1 has become available via --> http://mammoth3.gup.uni-linz.ac.at/~polch POLCH is an implicit solvation program for proteins ( residues < 500). It is based on the Poisson-Boltzmann approach and has the following characteristics, a) all expensive parts of the calculation are carried out on the specialized computer chip MD-GRAPE-2 b) consideration of electrostatic as well as non-polar contributions c) PCM-like decomposition into properly separated individual contributions d) usage of Gaussian cube format for ESP maps (electrostatic potentials) for straightforward visualization with VMD or MOLDEN e) support of several solvents, ie water, ethanol, n-octanol It is still all very much in a premature stage and therefore any comments/suggestions/experiences are greatly appreciated. best sig -- Siegfried Hoefinger, PhD Michigan Technological University Department of Physics 836 Dow Building 1400 Townsend Drive Houghton, Michigan, 49931 - 1295, USA From owner-chemistry@ccl.net Tue Aug 21 21:48:00 2007 From: "Rajarshi Guha rguha:-:indiana.edu" To: CCL Subject: CCL: Open Source 3D coordinate generation tool Message-Id: <-34973-070821154936-14205-AA+PzJeLLvMgYVhXJU78SQ[-]server.ccl.net> X-Original-From: Rajarshi Guha Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Date: Tue, 21 Aug 2007 15:22:04 -0400 Mime-Version: 1.0 (Apple Message framework v752.3) Sent to CCL by: Rajarshi Guha [rguha]_[indiana.edu] On Aug 21, 2007, at 12:44 PM, Igor Filippov Contr igorf(!) helix.nih.gov wrote: > > Sent to CCL by: "Igor Filippov [Contr]" [igorf .. helix.nih.gov] > Rajarshi, > > This is a great development, and I'm sure it will be welcomed by many! > Congratulations! Thank you! > - Is there any specific reason for Apache license? Do you think it > might > present difficulties for people who'd like to include this project in > their GPL code? My understanding is that the Apache license is very permissive and that the code can be included in GPL and related code. > - smi2sdf program seems to include an empty "name" property in the sd > output, and mengine has an empty "title" property - it might confuse > some other programs. Did the input SMILES have a title - I think that maybe the reason > - mengine seems to miss empty lines between the properties it adds, > for > example: We'll take a look at these problems and see what's going on ------------------------------------------------------------------- Rajarshi Guha GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04 06F7 1BB9 E634 9B87 56EE ------------------------------------------------------------------- After a number of decimal places, nobody gives a damn.