Abstract

Salts of the trans-[py₂AlCl₄]^– anion have been structurally characterized by ‘low’-temperature single crystal structure determinations of the adducts 2AlCl₃ · 2HCl · 4py {=(pyH)₂[(py)₂AlCl₄](AlCl₄)}, and 2AlCl₃ · 3HCl · 7py {=(pyH)₃[(py)₂AlCl₄]₂Cl}, extending the structurally characterized members of the array [(py)_nAlCl_(6–n)]^(n–3)± with ‘octahedral’ six-coordinate metal atom geometries, the members for n = 3 (mer) and 4 (trans) having been previously characterized.