Crystal structure of tris­(μ-bis­{4-(pyridin-2-yl­methyl­idene)amino­phen­yl}methane-κ4NN′:N′′N′′′)dizinc tetra­kis­(tetra­fluorido­borate) aceto­nitrile tris­olvate

摘要

The asymmetric unit of the title compound, [Zn2(C25H20N4)3](BF4)4·3CH3CN, consists of one dinuclear Zn^II complex cation with a triple-helical [Zn2 L 3]⁴⁺ motif (L is bis­{4-[(pyridin-2-yl­methyl­idene)amino]­phen­yl}methane), four BF4 ⁻ anions and three CH3CN solvent mol­ecules. The Zn⋯Zn separation is 11.3893 (14) Å and the ligands wrap around the two Zn^II atoms, forming a triple helix as defined by the Zn—N—N—Zn torsion angles of 104.05 (18), 99.06 (19) and 101.40 (19)°. The Zn—N(pyrid­yl) distances in the octahedral ZnN6 coordination sphere are in the range 2.128 (5)–2.190 (5) Å and the Zn—N(imine) distances are in the range 2.157 (5)–2.277 (5) Å.