1. Department of Chemistry The City College of New York 160 Convent Ave New York 10031 USA
2. Institute of Molecular Physics Polish Academy of Sciences ul. M. Smoluchowskiego 17 60179 Poznań Poland
3. Ph. D. Program in Chemistry The Graduate Center of the City University of New York New York 10016 USA
4. Dpto. de Quimica Inorganica Universidad de Malaga 290671 Spain