But it is not possible in group 3 elements. So that PCl6 is not possible as to the formation of PCl6 phosphorus must contain 6 valence electrons then it can form 6 bonds which include coordinate bond or covalent bond. Valency of phosphorus is -3 as it will accept 3 electrons from any other elements to complete its octet and be stable. Some of our important hybridization including s, p, and d orbital are given below:-Īns: PCl6 hybridization will not be possible because of the presence of only 5 valence electrons in case of phosphorus. The molecular geometry of is PCl5 trigonal bipyramid. The energy of 3d ~ energy of 3s ~ energy of 3p as well as e energy of 3d ~ energy of 4s ~ energy of 4p.īecause of the above reason hybridization of 3rd period elements include 3d, 3p, and 3s or 3d, 4s, and 4p ( as the energy of s and p is equivalent to d) and there is also an energy difference between 3p and 4s orbital which led to no hybridization of an element with 3p, 3d and 4s. If we talk for energy then for the 15th group elements like nitrogen, phosphorous (p), arsenic (Ar), antimony (Sb), and bismuth ( Bi) will be in the order:.
![hybridation sp3d hybridation sp3d](https://cdn.kastatic.org/ka-youtube-converted/BRHfy7envyQ.mp4/BRHfy7envyQ.png)
This hybridization of p in PCl₅ is possible due to the presence of d orbital in phosphorus. So in PCl₅ molecule hybridization of p will be sp3d. In the third period, there are s, p, and s subshells are present. As we know phosphorus belongs to the 3rd period in the modern periodic table. In solid state it will be in charged form.
![hybridation sp3d hybridation sp3d](https://i.ytimg.com/vi/Aq8Vz0jqy2M/maxresdefault.jpg)
PCl₅ can exist in both solid and gaseous states but is generally found in gaseous states.
![hybridation sp3d hybridation sp3d](https://i.ytimg.com/vi/JpkB-8EpA9g/maxresdefault.jpg)
Compound PCl₅ comprises of phosphorus and chlorine in the ratio of P: Cl = 1:5.