Why does Aluminum, Gallium, and Indium form halides of the form M2X6, but Thallium does not? Please explain? Thank you.
AlX3, GaX3 and IX3 can dimerize forming Al2X6, Ga2X6 and I2X6 Tl is a large atom in that it has F electrons so the potential to form a dimer is not thereTlX3 would be very unstable due to the size of Tlno dimer
