Aluminium (III) chloride forms a dimer because aluminium

Question

Aluminium (III) chloride forms a dimer because aluminium (A) belongs to 3rd group (B) can have higher coordination number (C) cannot form a trimer (D) has high ionization energy

Tardigrade Admin · Accepted Answer

AlCl 3 forms a dimer as there is unsaturation in coordination. Also it enables Al atoms to complete their octets. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/20435b2a2d9a9700ad3860a923e44f36-.png" />

Q. Aluminium (III) chloride forms a dimer because aluminium

belongs to 3^rd group

can have higher coordination number

cannot form a trimer

has high ionization energy

$A lC l_{3}$ forms a dimer as there is unsaturation in coordination. Also it enables $A l$ atoms to complete their octets.