answersLogoWhite

0


Best Answer

There are 5 outermost electrons in both phosphorus and nitrogen atoms but in nitrogen no more than three unpaired electrons are possible due to absence of d-orbitals in 2nd energy level so nitrogen may form only three covalent bonds (as NCl3 and NF3) but d-orbitals are present in 3rd energy level of Phosphorus so in excited state it may have five unpaired electrons and may form PCl5.

User Avatar

Wiki User

āˆ™ 14y ago
This answer is:
User Avatar
More answers
User Avatar

AnswerBot

āˆ™ 1w ago

PF5 is known because phosphorus readily forms a stable compound due to the presence of empty d orbitals which can accommodate additional electrons. In contrast, NCl5 and NF5 are not known due to the high electronegativity of nitrogen and the resultant instability of compounds with high coordination numbers. Additionally, the large size of chlorine atoms makes it difficult for them to bond with multiple nitrogen atoms.

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Why PF5 is known but neither NCl5 nor NF5 is known?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What type of hybrid orbital is PF3 and PF5?

PF5 :SP3d


What is the electron geometry of pf5?

The electron geometry (and also, the molecular geometry) of PF5 is Trigonal Bipyramidal.


What type of hybrid orbital is in pf3 and pf5?

In PF3, the central phosphorus atom uses sp3 hybrid orbitals. In PF5, the central phosphorus atom uses sp3d hybrid orbitals.


Is Pf5 a Lewis acid?

Yes, PF5 is a Lewis acid because it can accept an electron pair to form a new chemical bond. In this case, the phosphorus atom in PF5 can accept an electron pair from a Lewis base.


What is the name PF5?

It is Phosphorous pentafluoride.


Does AsH3 follow the octet rule?

No, AsH3 does not follow the octet rule. Arsenic, the central atom in AsH3, can expand its valence shell to hold more than eight electrons in bonding.


How would you write the formula for phosphorus pentafluoride?

The chemical formula for phosphorus pentafluoride is PF5.


Is Pf5 molecular?

It is nothing. Love-Keyana Correia


What is the difference between PF3 and PF5 molecules?

The geometry is different and also reactivity. 2F more than on PF3 trigonal bipyramidal PF5 trigonal pyramidal PF3


What is the electron geometry of the molecules PF3 and PF5?

trigonal planar


What is the correct formula for the molecular compound heptaphosphorus octafluoride?

The correct formula for the molecular compound heptaphosphorus octafluoride is Pā‚‡Fā‚ˆ. It consists of 7 phosphorus atoms bonded to 8 fluorine atoms.


What is the electron pair geometry and the molecular geometry of PF5?

Trigonal Bipyramidal