1. Institute of Inorganic Chemistry of the Czech Academy of Sciences CZ-250 68 Husinec – Řež Czech Republic
2. Universität Bielefeld Fakultät für Chemie Anorganische Chemie und Strukturchemie Universitätsstraße 25 33615 Bielefeld Germany
3. Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences CZ-16610 Praha 6 Czech Republic
4. Department of Chemistry and Biochemistry Auburn University Auburn Alabama 36849 USA