1. Department of Chemistry; University of North Texas; 1155 Union Circle, #305070 Denton TX 76203-5017 USA
2. Área de Química Orgánica, Instituto de Bioingeniería; Universidad Miguel Hernández; Avda. de la Universidad s/n 03203 Elche Spain
3. Departement of Chemistry; University of Crete, Laboratory of Bioinorganic Chemistry; Voutes Campus 70013 Heraklion, Crete Greece
4. Department of Physical Sciences and Mathematics; Wayne State College; 111 Main Street Wayne, Nebraska 68787 USA