Institution: | 1. Institute of Chemistry, Organic Chemistry, Martin‐Luther‐University Halle‐Wittenberg, Kurt‐Mothes‐Str. 2, 06120 Halle (Germany), Fax: (+49)?345‐552‐7346;2. Institute of Chemistry, Physical Chemistry, Martin‐Luther‐University Halle‐Wittenberg, Mühlpforte, 06108 Halle (Germany) |