(C) In $B_2H_6$,there are $4$ terminal $B-H$ bonds which are $2$-centre-$2$-electron $(2c-2e)$ bonds.There are $2$ bridged hydrogen atoms which form $

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Out of $6$ $B-H$ bonds,four bonds can be described in terms of $3$-centre-$2$-electron bonds.

(C) In $B_2H_6$,there are $4$ terminal $B-H$ bonds which are $2$-centre-$2$-electron $(2c-2e)$ bonds.There are $2$ bridged hydrogen atoms which form $2$ bridge $B-H-B$ bonds.Each bridge $B-H-B$ bond is a $3$-centre-$2$-electron $(3c-2e)$ bond.Therefore,there are only $2$ such $3c-2e$ bonds,not $4$.Thus,statement $(C)$ is incorrect.

Class 11 Chemistry Chemical Bonding and Molecular Structure Covalent bonding

Medium

According to the given figure,which of the following statements is incorrect?

AP EAMCET 2020 All AP EAMCET

A
The $2$ bridged hydrogen atoms and $2$ boron atoms lie in one plane.
B
Out of $6$ $B-H$ bonds,two bonds can be described in terms of $3$-centre-$2$-electron bonds.
C
Out of $6$ $B-H$ bonds,four bonds can be described in terms of $3$-centre-$2$-electron bonds.
D
The four terminal $B-H$ bonds are $2$-centre-$2$-electron regular bonds.