Accepting Answers...
   « »

Why are pentahalides more covalent than trihalides in group 15 elements?


Posted- 2357 days ago
3 Answers

Answer This

this is because pentahalides have extra stable half filled orbilatal the normal filled

 
In pentahalides in gp 15 elements there is sp^3d hybridization while in trihalides, it has sp^2 hybridisation. so pentahalides have less s-character than trihalides, so less electronegative; thus are more covalent than trihalides.
 

it is so because group 15 element have 5 valence elecron and formation of bonds leads to the covalent bonding but in trihalides, it formed ionic bonds due to sharing of electrons.