Studies on macrocyclic complexes derived from vic-dioximes. VIII. The crystal structure of the π-sandwich compound between bis(difluoroborondimethylglyoximato)nickel(II) and anthracene

The 1:1 adduct of anthracene with bis(difluoroborondimethylglyoximato)nickel(II) is monoclinic, space group P2₁/n, a = 7.773(11), b = 15.681(19), c = 9.579(11) Å, β = 96.0(2)°, Z = 2. The structure was refined to R = 0.093 for 1948 photographic reflexions. The two molecules each have a space group imposed centre of symmetry and the Ni(dmgBF₂)₂ molecule has the axial fluorine atoms in a trans-configuration. The anthracene and macrocycle molecules are nearly parallel and their close relative orientation indicates that a ππ interaction between them exists. The effectively gives rise to chains of molecules aligned along a with continuous ππ interaction in that direction.