1. Department
of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
2. Department
of Chemistry, University of Winnipeg, Winnipeg, Manitoba R3B 2E9, Canada
3. Institute
of Organic Chemistry, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, Switzerland
4. Thunder Bay Regional Research Institute, 980 Oliver Road, Thunder Bay, Ontario P7B 6V4, Canada
5. Department
of Chemistry, Queen’s University, 90 Bader Lane, Kingston, Ontario K7L
3N6, Canada