# What is the molecular shape of a silane molecule, SiH_4?

May 14, 2018

Would it not have the same shape as homologous methane?

#### Explanation:

$C {H}_{4}$ consists of FOUR covalent bonds around the central carbon atom...and by VESPER the most stable electronic geometry is that of a tetrahedron. While $S i - H$ bonds are necessarily longer, the molecular geometry of silane is still tetrahedral with $\angle H - S i - H = {109.5}^{\circ}$...

What about $\text{germane}$, $G e {H}_{4}$?