Describe the hybridisation in case of PC | Class 11 Chemistry Chapter Chemical Bonding and Molecular Structure, Chemical Bonding and Molecular Structure NCERT Solutions

Question:

Describe the hybridisation in case of PCl₅. Why are the axial bonds longer as compared to equatorial bonds?

Answer:

Atomic number of Phosphorous is 15.

The Ground state configuration is

& the excited state configuration is

The 5 electrons present in valence shell form bond pairs with the electrons of five chlorine atoms. Phosphorus atom is sp3d hybridized in the excited state.

PCl₅

The geometry of PCl₅ is trigonal bipyramidal .The P atom lies in the centre of an equatorial triangle & three P-Cl bonds (equatorial bonds) are directed towards its three corners with 120° bond angle. The remaining two P-Cl bonds (axial bonds) lie above & below the plane of the triangle at bond angle 90° .

The axial bonds are longer than equatorial bonds because the axial Cl atoms suffer from more repulsion then the equatorial Cl atoms,as a result the axial Cl atoms tries to reside far away from the equatorial Cl atoms, & hence axial bond are longer than equatorial bonds.

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Comments

Gandheswari
2019-09-24 09:13:20

Thanku

haha
2019-09-13 22:38:55

wrong config given... please correct

Prakash Pramanik
2018-11-24 21:02:15

Orbital diagram of P atom

Prakash Pramanik
2018-11-24 21:01:13

Formation of PCl5 molecule class11th

Vijay Hemanth
2018-09-21 11:36:15

Define BMO and ABMO? How is it used to calculate bond order of the molecule???

Adarsh Kumar singh
2018-04-20 17:43:06

Answer is right but electronic configuration is wrong because 3P have 3 degerated orbital and 3D have 5.

Bijay
2017-10-20 18:26:02

Answer is good but it electroni configuration is give wrong

pankaj Sharma
2017-10-12 21:40:59

Nice working with this answered

BHAVEY
2016-03-10 18:30:20

exelent...

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Welcome to the NCERT Solutions for Class 11 Chemistry - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 38: Describe the hybridisation in case of PCl5. Why are the axial bonds longer as compared to equatorial....

Describe the hybridisation in case of PC | Class 11 Chemistry Chapter Chemical Bonding and Molecular Structure, Chemical Bonding and Molecular Structure NCERT Solutions

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