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Describe the shapes of BF3 and BH4. Assign the hybridisation of boron in these species.

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(i) BF3 As a result of its small size and high electronegativity, boron tends to form monomeric covalent halides. These halides have a planar triangular geometry. This triangular shape is formed by the overlap of threesp2 hybridised orbitals of boron with the sp orbitals of three halogen atoms. Boron...
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(i) BF3

As a result of its small size and high electronegativity, boron tends to form monomeric covalent halides. These halides have a planar triangular geometry. This triangular shape is formed by the overlap of threesp2 hybridised orbitals of boron with the sp orbitals of three halogen atoms. Boron is sp2 hybridised in BF3.

(ii) BH4

Boron-hydride ion (BH4) is formed by the sp3 hybridisation of boron orbitals. Therefore, it is tetrahedral in structure.

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Shape of BF3 Trigonal planer And Shape of BF4- is tetrahedral
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