%0 Journal Article %A Abolfathi, Eynallah %T Electronic effects at 2 and 7 α–position of divalent unsaturated seven membered ring R2C6H6M (M=C, Si, Ge, Sn, Pb) %J Journal of Physical & Theoretical Chemistry %V 13 %N 2 %P 179-184 %D 2016 %R %U https://sanad.iau.ir/fa/Article/819178