四角锥形结构化合物BeB4X4(X=H,F,Cl),HBB4H4与BB4H4+中B4平面环的半芳香性
사각추형결구화합물BeB4X4(X=H,F,Cl),HBB4H4여BB4H4+중B4평면배적반방향성
One Kind of B4 Plane Ring in the Square Pyramidal Clusters BeB4X4(X=H,F,Cl),HBB4H4 and BB4H4+ with Special Half Aromaticity