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How will you account for the following? CIF_(3) molecule has T-shaped structure and not a trigonal planar one. |
Answer» SOLUTION :The electronic configuration of Cl (Z = 17) is `1s^(2) 2s^(2) 2P^(6) 3s^(2) 3p_(x)^(2) 3p_(y)^(2) 3p_(z)^(1)`. It has only one half-filled orbital. But to form three Cl-F bonds, we need three half-filled orbitals. To achieve this, one of the `3p_(y)` ELECTRONS GETS excited to 3d-orbital. The resulting five orbitals of the third shell of Cl in the first excited  state undergo `sp^(3)` d-hybridization to give T-shaped structure to `ClF_(3)` molecule. Since Cl does not undergo `sp^(2)`-hybridization, therefore, `ClF_(3)` does not have trigonal planar structure. 
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