From owner-chemistry@ccl.net Sun Apr 26 14:49:00 2009 From: "Dipankar Roy dipankarroy%a%iitb.ac.in" To: CCL Subject: CCL:G: Diffuse function as a necessay evil Message-Id: <-39170-090426140024-3497-aQUa0IikKpJmmXOjpmUtZw . server.ccl.net> X-Original-From: "Dipankar Roy" Content-Transfer-Encoding: 8bit Content-Type: text/plain;charset=utf-8 Date: Sun, 26 Apr 2009 22:30:01 +0530 (IST) MIME-Version: 1.0 Sent to CCL by: "Dipankar Roy" [dipankarroy{=}iitb.ac.in] Hi, You can use Duuning's augmented basis sets. For Gaussian program, you can use Gen keyword for defining different basis set for different atoms. Gaussian web sites and manual contains detailed explanation for the same. Hope this may help, Dipankar Roy *********************************************** Dipankar Roy Graduate Student of Prof. R. B. Sunoj Computational Chemistry Laboratory Dept. of Chemistry Indian Institute of Technology, Bombay India - 400076 Phone: +91-22-2576-4130(lab) *********************************************** WE ARE PERHAPS NOT FAR REMOVED FROM THE TIME WHEN WE SHALL BE ABLE TO SUBMITTHE BULK OF CHEMICAL PHENOMENA TO CALCULATION. -- JOSEPH LOUIS GAY-LUSSAC MEMOIRES DE LA SOCIETE D'ARCUEIL, 2, 207 (1808)