Question:
Among the following compounds of Boron, the species which also forms $\pi $ - bond in addition to $\sigma$ - bonds is:
Among the following compounds of Boron, the species which also forms $\pi $ - bond in addition to $\sigma$ - bonds is:
Updated On: Jun 20, 2022
- $ BF^{-}_4$
- $BH_3$
- $B_2 H_6$
- $BF_3$
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The Correct Option is D
Solution and Explanation
$BF _{3}$ show back-bonding via formation of $\pi$ -bond due to :
(i) presence of vacant orbital $(2 p)$ in boron element and lone pair of electrons available in $2 p$ orbital of fluorine element.
(ii) Due to small size of boron and fluorine atoms, $\pi$ -bond (a back bond) is formed in addition to \sigma-bond between $B$ and $F$ atoms.
(i) presence of vacant orbital $(2 p)$ in boron element and lone pair of electrons available in $2 p$ orbital of fluorine element.
(ii) Due to small size of boron and fluorine atoms, $\pi$ -bond (a back bond) is formed in addition to \sigma-bond between $B$ and $F$ atoms.
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Concepts Used:
Group 13 Elements
Group 13 is commonly known as the Boron Family. The boron family comprises:
- Boron (B)
- Aluminum (Al)
- Gallium (Ga)
- Indium (In)
- Thallium (Tl)
Element 113 (Nihonium) gets the name of ununtrium Uut. Each one of the elements has three electrons in the external shell of their nuclear structure is one of the important and mutual properties of the group.
The general electronic configuration for the group 13 elements is ns2 np1.
Density of Boron Family:
Melting point and Boiling Point:
Electronegativity:
Atomic and Ionic Radii:
Compounds of Group 13 Elements:
- Oxides
- Halides
- Borates
- Boron Hydrides
- Diborane
- Borazine