CCL: Easy convergence of Diffuse functions

From: "Mr Shabbir" <shabbir##nenu.edu.cn>
Subject: CCL: Easy convergence of Diffuse functions
Date: Sun, 31 Aug 2008 07:41:56 -0400

 Sent to CCL by: "Mr  Shabbir" [shabbir]^[nenu.edu.cn]
 Dear all
 I want to share some thing about optimization. I optimized several systems with
 6-31G* basis set but when I use diffuse function (+) the same previously
 optimized system at (6-31G*) fails to converge by using diffuse function. How to
 treat the diffuse function especially in optimization? Is there any special
 keyword or way that can make the convergence easy with diffuse functions?
 Regards
 Mr.Shabbir
 shabbir_._nenu.edu.cn