فهرس المقالات Alkynes حرية الوصول المقاله صفحة الملخص نص كامل 1 - A Density Functional Approach toward Structural Features and Properties of C20 and its Complexes with C2X4, C2X2 (X = H, F, Cl, Br) for Synthesis Application Reza Ghiasi Farideh Hadi Amir Hossien Hakimyuon