CCL: Basis set result quality, MB+polar vs DZ

 Sent to CCL by: "Jim Kress" [ccl_nospam{:}]
 Has anyone a reference to any articles, or any factual information
 concerning, the quality of results for geometry optimization obtained using
 a minimal basis set plus polarization functions versus that obtained using a
 double zeta basis with no polarization functions?  I am particularly
 interested in organometallic species.
 Any assistance would be appreciated.  I'll post a summary of responses to
 the list.
 Jim Kress