Which of the following compounds forms a dati | vedclass

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(B) dative bond (coordinate covalent bond) is formed when a species with a lone pair of electrons donates them to an electron-deficient species. Ammon

Vedclass · Accepted Answer

$BCl_3$

Vedclass · Answer

(B) dative bond (coordinate covalent bond) is formed when a species with a lone pair of electrons donates them to an electron-deficient species. Ammonia $(NH_3)$ acts as a Lewis base because it has a lone pair of electrons on the nitrogen atom. $BCl_3$ is a Lewis acid because the boron atom has an incomplete octet (only $6$ electrons in its valence shell). Therefore,$NH_3$ donates its lone pair to the boron atom in $BCl_3$ to form an adduct,$H_3N \rightarrow BCl_3$,which contains a dative bond.

Which of the following compounds forms a dative bond with ammonia?

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Assertion $(A)$: $AlCl_3$ exists as a dimer through halogen bridged bonds.
Reason $(R)$: $AlCl_3$ gets stability by accepting electrons from the bridged halogen.

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