Erratum to: Struct Chem (2009) 20:869–876 DOI 10.1007/s11224-009-9485-1

Unfortunately, in the affiliation section, Dr. Z. Shi—one of the corresponding authors is not distinguished as the corresponding author. Now, we have included Dr. Z. Shi also as the corresponding author and his email ID is included as shown below in the affiliation section.