1. Department
of Chemistry and Pharmaceutical Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
2. Arkema B.V., location Vlissingen, P.O. Box 70, 4380 AB Vlissingen, The Netherlands
3. Laboratory
of Inorganic Chemistry, Department of Chemistry, University of Helsinki, A. I. Virtasen aukio 1, P. O. Box 55, Helsinki, Finland
4. Department
of Chemistry, University of Johannesburg, Oakland Park 2006, South Africa