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.

Question

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. (A) Both (A) and (R) are true and (R) is the correct explanation of (A) (B) Both (A) and (R) are true but (R) is not the correct explanation of (A) (C) (A) is true, but (R) is false (D) (A) is false, but (R) is true

Tardigrade Admin · Accepted Answer

AlCl 3 exists as a dimer through halogen bridged bonds. It is an electron deficient species. In order to complete the octet of aluminium, the molecule dimerises to form Al 2 Cl 6 in which electrons are added to aluminium octet through coordinate bond by chlorine atom. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/f067c9da39b54de1151a2a392b12751f-.png" /> Al 2 Cl 6 forms from two AlCl 3 molecules. Since, two Cl atoms can act as a "bridge".

Q. Assertion (A) AlCl3​ exists as a dimer through halogen bridged bonds. Reason (R) AlCl3​ gets stability by accepting electrons from the bridged halogen.

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true but (R) is not the correct explanation of (A)

(A) is true, but (R) is false

(A) is false, but (R) is true

Q. Assertion (A) $A lC l_{3}$ exists as a dimer through halogen bridged bonds.
Reason (R) $A lC l_{3}$ gets stability by accepting electrons from the bridged halogen.