Square-pyramidal bonding of I2 molecules at the I- nodes of a polyiodide infinite pseudo-cubic 3D-network

The reaction of di-[2]-pyridyl-disulfide (L) with diiodine in molar ratios ranging between 1 : 0.5 and 1 : 5 afforded [(HL+)(I-) . 5/2I(2)] as the only product, containing the first example of a self-assembled infinite polyiodide pseudo-cubic 3D-network featuring distorted square pyramidal I-. 5I(2) moieties at the nodes.