CCL: 6-31G basis set

[Mikael Johansson <mikael.johansson%a%helsinki.fi>]

 Sent to CCL by: Mikael Johansson [mikael.johansson[-]helsinki.fi]
 Hello!
 On Mon, 20 Feb 2006, Goedele Roos groos|a|vub.ac.be wrote:
> I've read somewhere that the 6-31G basis set in
>  combination with HF is
>  a bit tricky and that one can better use a 6-31G** basis set. Is thit
>  correct? And what is the reason therefore?
>  
In short, 6-31G** is larger and thus stands a better chance of
 describing
 the Hartree-Fock wave function correctly.
I recommend Frank Jensen's book "Introduction to Computational
 Chemistry",
 it's quite good: http://bogense.chem.sdu.dk/~icc/
 Have a nice day,
     Mikael J.
     http://www.helsinki.fi/~mpjohans/