Why is the bond energy of P-Cl bond different in PCl3 and PCl5?
Table of Contents
- 1 Why is the bond energy of P-Cl bond different in PCl3 and PCl5?
- 2 Why are bond lengths in PCl5 different?
- 3 Why PCl5 has two types of bond length but in PF5 all bond lengths are same?
- 4 What is correct about bond length of pcl3?
- 5 What is the bond energy of P-CL?
- 6 Why all bonds in PF5 are not equivalent?
Why is the bond energy of P-Cl bond different in PCl3 and PCl5?
The hybrization of P in PCl3 is sp3 and in PCl5 is sp3d. Cl is more electronoegative than P so it tends to pull electron density away from P. This will weaken the strength of the bond between the other P—Cl bonds.
Why are bond lengths in PCl5 different?
In PCl5 there are 3 equatorial bonds and 2 axial bonds. The axial bonds are longer than the equatorial bonds because of greater repulsion from equatorial bonds. The 2 axial bonds are at 90° angle to the 3 equatorial bonds. While all 3 equatorial bonds are at 120° angle to each other.
Do you expect P − Cl bond energy to be same in PCl3 and PCl5 explain your answer?
The P−Cl bond in PCl3 is stronger (322 kJ/mol) than that in PCl5 (260 kJ/mol). However the 326 kJ/mol value comes from the average of all P−Cl bonds found in all known molecules containing P−Cl bonds (including but not limited to PCl3 and PCl5).
Why PCl5 has two types of bond length but in PF5 all bond lengths are same?
All bond lengths in PF5 molecule are same and this is due to berry pseudo rotation which causes the rotation of 4 fluorine atoms keeping 1 fixed about the P atom thus changing symmetry from trigonal Bi pyramidal geometry to square pyramidal geometry thus all bond lengths become equal.
What is correct about bond length of pcl3?
Molecular Parameters – Phosphorus – Bismuth Compounds
| Molecular Formula | Name | Bond Length (Å) |
|---|---|---|
| PCl3 | phosphorus trichloride | P-Cl 2.043 ± 0.003 |
| PCl3O | phophorus oxychloride (phosphoryl chloride) | P-O1.45 ± 0.05 P-Cl 1.99 ± 0.02 |
| [PCl4]+ | P-Cl 1.98 | |
| PCl5 | phosphorus pentachloride | a = 2.04 ± 0.06 b = 2.19 ± 0.02 |
What is the length of be Cl bond?
Bond length of Be-Cl bond is 209. 86 pm.
What is the bond energy of P-CL?
Common Bond Energies (D
| Bond | D (kJ/mol) | r (pm) |
|---|---|---|
| P=O | 544 | 150 |
| P=S | 335 | 186 |
| P-F | 490 | 154 |
| P-Cl | 326 | 203 |
Why all bonds in PF5 are not equivalent?
Answer Expert Verified concept :- bond length depends upon hybridization of molecule . we know, structure of SP³d is an Triangular bipyramidal . in which three bonds have equal length but two bonds (axial bond) are longer. so, all bonds of PF5 isn’t equal .
Are all bonds in PF5 equivalent?
PF5 is made up of two types of bonds namely covalent and coordinate, hence are not equivalent.