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bazaltina [42]
3 years ago
8

Of the following, only ________ has sp2 hybridization of the central atom. Of the following, only ________ has sp2 hybridization

of the central atom. ICl3 PBr3 SiH2Br2 HCN BF3
Chemistry
1 answer:
vladimir1956 [14]3 years ago
5 0

Answer:

BF3

Explanation:

Hybridization can be defined as the mixing of two or more atomic pure orbitals. ( s, p ,  and d) to produce two or more hybrid atomic orbitals that are similar and identical in shape and energy e.g sp,sp²,sp³ ,sp³d, sp³d². Usually , the central atom of a covalent molecules or ion undergoes hybridization.

in BF3; Boron is the central atom. Here, A 2s  electron is excited from the ground state of boron ( 1s²2s²2p¹) to one empty orbitals of 2p.

The 2s orbital is then mixed with two orbitals of 2p to form three sp² hybrid orbitals tat are trigonally arranged in the plane in order to minimize repulsion . Each of the three hybrid orbitals overlaps with p-orbital of fluorine atom to form three bonds of equal strength and with bond angles of 120⁰.

  <u>                          </u>       Energy              <u>                                           </u>          

B<u>     ⇵  ║   ⇅  ║    ↑     </u>----------->    *B  <u>  ⇵ ║     ↑  ║     ↑  ║   ↑</u>

       1s      2s         2p                              1s       2s           2p  

    Ground state                                        Excited State

The above shows an illustrative example of how electrons  move from the ground state to the excited state.

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