The P-CI bond length in PCla is 204 pm. In contrast, PCIs has two different P-CI

Question

The P-CI bond length in PCla is 204 pm. In contrast, PCIs has two different P-CI bond lengths in the gas phase, shown below: 2. AXN notation: Cl 202 pm molecular geometry: Cl 214 pm VSEPR bond angles: Cl (a) Provide the AXN notation, molecular geometry, and predicted bond angles in PCIs. (b) Comment on the bond strength and bond order of the axial P-CI bonds compared to the P-Cl single bonds in PCI3. (c) It is possible to draw the structure of PCIs while obeying the octet rule. With this in mind-and using your answer in part (b)-draw two resonance structures for PCIs which contribute to the observed bond lengths and label any nonzero formal charges. (d) Draw the resonance hybrid and calculate the bond order of the axial P-CI bonds.

Explanation / Answer

a.AXN notation : A is central atom and X is cominging atom and N is the number, so PCl5

Molecular Geometry : Tri gonal bi pyramidal

Bond Angles : Three P-Cl bonds lie in one plane and make an angle of 1200 with each other. The remaining two P-Cl bonds one lying above and other lying below the equatorial plane make an angle of 900 with the plane

b.P-Cl in PCl5 is strong bond because In PCl5 the P-Cl bond formed due to overlap of sp3d orbitals of phosphurus with the singly occupied p orbitals of chlorine, In PCl3 the P-Cl bond formed due to overlap b/w the sp3 orbitals of phosphurus with p orbitals of chlorine.

c. yes, but the central atom is not possible it is having expanded octet due to availability of emty d-orbitals, other comining atom is satisfied octet.

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