List of Articles Energy gap Open Access Article Abstract Page Full-Text 1 - Steric effects on the Singlet–Triplet Energy Gaps of Seven Membered Ring silylenes, R2C6H6Si M. Nikoorazm E. Vessally E. Abolfathi Open Access Article Abstract Page Full-Text 2 - IR spectroscopic study and DFT calculations on dibenzyltin dichloride Leile Rahimi Ahar Moayad Hossaini Sadr Karim Zare Samad Motameni Tabatabei Open Access Article Abstract Page Full-Text 3 - Electronic effects at 2 and 7 α–position of divalent unsaturated seven membered ring R2C6H6M (M=C, Si, Ge, Sn, Pb) Eynallah Abolfathi Open Access Article Abstract Page Full-Text 4 - Different substituted phenyl carbenes / silylenes/ germylenes: a survey of stability Fereshteh Naderi Rahimeh Bagheri Mohammad Yari