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Bond angle in PH_(4)^(+)is higher than that in PHz. Why? |
Answer» Solution : Both `PH_4^+`and `PH_3`involve `sp^3`hybridisation of P atom. In `PH_4^+`all the four orbitals are BONDED, WHEREAS in PH, there is a lone pair of electrons on P. In `PH_4^+` , the HPH bond angle is TETRAHEDRAL angle of `109.5^@`. But in `PH_3` , lone pair-bond pair repulsion is more than bond pair-bond pair repulsion so that bond angles becomes LESS than normal tetrahedral angle of `109.5^@`. The bond angle in `PH_3`has been found to be about `93.6^@`
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