1. Institut für Anorganische und Analytische Chemie; Friedrich-Schiller-Universität Jena; Humboldt Str. 8 07743 Jena Germany
2. Department of Chemistry and Biochemistry; The University of Arizona; Tucson AZ 85721 USA
3. Chemistry Department; Jordan University of Science and Technology; Irbid 22110 Jordan
4. UMR CNRS 6521; Université de Bretagne Occidentale; 6 avenue Le Gorgeu, C.S. 93837 29238 Brest-Cedex France
5. Section of Heteroorganic Compounds; University of Lodz; Tamka 12 91-403 Łódź Poland