1. Department of Chemistry, College of the Holy Cross, Worcester, MA 01610, USA, Fax: +1‐508‐793‐3530, http://academics.holycross.edu/chemistry/faculty‐staff/herrick
2. Department of Chemistry, University of Akron, Akron, OH 44325, USA Homepage: http://www.uakron.edu/chemistry/faculty‐staff/ziegler.dot