Petrochemical Research Chair, Department of Chemistry,
College of Science (Building 5), King Saud University,
PO Box: 2455 Riyadh 11451 Riyadh City: Kingdom of Saudi Arabia.
Mobil: Mobile ++ 966 555452169
Fax ++ 966 1 4675992
E-mail: petrochem@ksu.edu.sa
ssdeyab@ksu.edu.sa