Question

Predict the hybridisation and shape of BeF2​

Answer 1

BeF2

Since there are no unpaired electrons in the valency shell, it cannot form any covalent bond. Thus, 2s-orbital is first unpaired and an electron is shifted to 2p-orbital. Now, there is hybridization between one s-and one p orbital. Two orbitals (hybrid) of same shape and energy come into existence.

Answer 2

Answer:

In BeF2, Be atom is sp hybridised i.e. two hybrid orbitals are directed along a straight line with a bond angle equal to 180°. Each sp hybrid orbital overlaps axially with 2p half-filled orbital of F atom to form sigma Be – F bonds

Explanation:

The two sp hybrid orbitals are linear and oriented in opposite directions at an angle of 180°. Each of the sp-hybridised orbital overlaps axially with half-filled orbital of fluorine atom to from two Be—F sigma bonds figure below. Due to the sp-hybridised state of beryllium, BeF2 molecule has linear shape.

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