# Why does AsH5 not exist?

Why does $\ce{AsH5}$ not exist? Is it because the s-orbital of H doesn't and can't overlap with the d-orbital of As after As makes $\rm sp^{3}d$ hybridization?Theoretically the bond can occur because we can make $\rm sp^3d^2$ hybridization for As to give rise for 5 orbitals with 1 electron each and which can accept the 5 H atoms, but why is this not true in reality?

• – Mithoron Jan 15 '16 at 0:07
• This is definitely not a duplicate question. See especially page 15 of "Ligand Coupling Reactions with Heteroatomic Compounds" books.google.com/… – DavePhD Jan 15 '16 at 14:59