1. Polymerization Engineering Department Iran Polymer and Petrochemical Institute (IPPI) P.O. Box 14965/115 Tehran Iran
2. School of Chemistry University College Cork College Road T12 K8AF Cork Ireland
3. Institut de Química Computacional i Catàlisi Departament de Química Universitat de Girona Mª Aurèlia Capmany 69 17003 Girona Spain