1. Department
of Physical Chemistry, University of Geneva, 30 quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
2. Institute
of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanskaya str. 5, Kiev, 02094, Ukraine
3. Institut
für Chemie der Humboldt-Universität Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany