C(sub 2h) (B(sub n)E(sub m)Si)2H2 molecules (E = B, C, Si; n = 3-6; m = 1, 2) containing double planar tetra-, penta-, and hexacoordinate silicons

A density functional theory investigation on a series of S-shaped or cyclic (B(sub n)E(sub m)Si)2H2 molecules (E = B, C, Si; n = 3-6; m = 1, 2) containing double planar tetra-, penta-, and hexacoordinate silicons is presented. Theoretical evidence is provided to support the earlier proposed structural pattern to host planar hypercoordinate silicons in small aromatic molecules.