101okkk im srry..i just thot abt nitrogen thr... PH5 is possible..!!
as it has 3d orbitals..!!
5 Answers
101The extent of overlapping of d orbital of Phosphorus and 1s orbital of H is very less becoz the energy difference between them is too high for favourable bond formation so at the most 1s of H can interact considerably with p orbitals that is why PH3 exists whereas u don't see PH5 as d-s overlapping is less so it dissociates into PH3 and H2...
101because it does not have a d-orbital !!
since it has its last configuration 3p3 soo.. it can only form 3 bonds! :)
Jeet Sen Sharma phosphorus has a d orbital !!!!!!!!Upvote·0· Reply ·2012-06-30 03:26:22
101101noppee.. studied today in details abt yy PH5 is not possi..
- Jeet Sen Sharma yyyy
41Phosphorus can form bonds to five ligands, as in PF5 or PCl5, by using its d-orbitals. However, this becomes much stable if you involve pi-overlap with p-orbitals on the ligands. F and Cl have p-orbitals and that's why they form stable PF5 or PCl5. On the other side H do not have p-orbital, instead it has only s-orbitals and that's why it forms much less stable s-d bonds.
So, PH5 can exist but it won't be stable, because PH5 splits too easily into the more stable PH3 and H2.