1. Organisch-Chemisches Institut Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
2. Interdisciplinary Center for Scientific Computing Heidelberg University Im Neuenheimer Feld 205 A D-69120 Heidelberg Germany
3. Chemistry Department Faculty of Natural Science Sarajevo University Zmaja od Bosne 33-35 71000 Sarajevo Bosnia and Herzegovina
4. Anorganisch-Chemisches Institut Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
5. Chemistry Department Faculty of Science King Abdulaziz University (KAU) Jeddah 21589 Saudi Arabia